4 Easy Ways to Thicken a Casserole - wikiHow (2024)

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1Adding Starch

2Using Thickening Nuts and Seeds

3Removing Excess Liquid

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Co-authored byMarkeicha Dulaney

Last Updated: April 25, 2024References

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A casserole is an easy and delicious dish that's perfect for when you are craving something warm and hearty. Although it's simple to put together and bake in the oven, it can sometimes turn out too liquidy. Thankfully, it's easy to thicken a casserole by adding typical starches, cooking with thickening nuts and seeds, or even just removing the excess liquid.

Method 1

Method 1 of 3:

Adding Starch

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  1. 1

    Thicken a meat casserole the most popular way with flour. Add some flour to your pan after you've browned the meat and before adding any liquid. This way, the flour will soak up the juices and fat in the pan. Add about one teaspoon of flour at a time until you get the right thickness.[1]

    • Use oatmeal four if you have a gluten allergy.
    • You can also add your seasonings to the flour and toss the meat in it before cooking it.
  2. 2

    Make a roux. A roux is made with equal parts butter and wheat flour. First, cook the butter over medium heat until thoroughly heated. Slowly add in the flour while whisking. Continue whisking about 2-3 minutes after all the flour has been added. Combine this paste with the base liquid of your casserole before adding it to the casserole dish.

    • 1 ounce (28g) of butter and 1 ounce (28g) of flour should be enough to thicken 1 US pint (2.0c) of liquid.[2]
    • For a vegan version, substitute oil instead of butter.[3]

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  3. 3

    Mix up a beurre manié if you don't want to cook your thickener. A beurre manié is similar to a roux except it does not require any cooking. Simply whisk equal parts butter and flour together.[4] Then, roll the thick paste into little teaspoon-sized balls. Add one ball to your casserole at a time, waiting about a minute before adding another one, until you get the right thickness.[5]

    • If you make too much beurre manié, you can also freeze the remaining balls and use them later.
  4. 4

    Make a cornstarch slurry for a fast and easy thickener. Whisk together equal parts cornstarch and cold water in a small bowl. Use one tablespoon of cornstarch per cup of liquid you would like to thicken.[6] Stir out all the lumps. A few minutes before your casserole is done, add it a little at a time until you are happy with the thickness.[7] Then, let the casserole finish baking.

    • You can also substitute chickpea flour for cornstarch. Chickpea flour is an excellent thickener for savory dishes.[8]
  5. 5

    Thicken a dairy-free casserole with arrowroot powder. You can also use arrowroot powder instead of cornstarch. Arrowroot starch does not combine well with dairy, but is an extremely effective thickener for dairy-free dishes.[9]

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Method 2

Method 2 of 3:

Using Thickening Nuts and Seeds

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  1. 1

    Use chia seeds for extra nutritional benefits. Chia seeds expand and thicken when added to water. They are also packed with protein, omega-3s, and fiber. Mix 1 tablespoon of chia seeds with 13 cup (79ml) water. Wait 15 minutes for the mixture to thicken, then slowly add to the casserole just before it's finished baking in the oven.[10]

    • Chia seeds are also rich in vitamins and minerals like magnesium, calcium, phosphorus, and B vitamins.
  2. 2

    Add ground flax seeds if you need an extra strong thickener. Flax seed absorbs water quickly and you only need a small amount to make a big difference. Grind the flax seeds in a food processor or coffee grinder and add them little by little directly to the casserole just before it's finished baking. Try adding 1 tablespoon of flaxseed per cup of casserole liquid.[11]

    • If you don't want to grind the flax seeds yourself, you can also buy them already ground.
  3. 3

    Try raw cashews for a smooth consistency. Cashews are great for thickening vegan recipes because of their creamy consistency. Use ¼ cup of cashews for every cup of casserole liquid.[12] Soak the cashews in water overnight in the refrigerator. Drain the water off and blend in a blender. Then, add them directly to your casserole broth before baking.[13]

    • If you are pressed for time and can't soak the cashews overnight, bring a pot of water to boil. Remove it from the heat and soak your cashews in the water for half an hour.[14]
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Method 3

Method 3 of 3:

Removing Excess Liquid

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  1. 1

    Strain the liquid from the casserole after cooking. If you have a lot of liquidy broth in your casserole, you can gently pour it out of the casserole dish after cooking. To do this, put a lid over the casserole dish. Leave a small slit on one side and pick up the dish with oven mitts. Gently pour the liquid through the slit, trying not to disturb the other elements in the casserole.

    • You don't necessarily have to get rid of the extra liquid. Try pouring it into a pot and simmer on medium heat until it reduces and thickens. You can then add it back to the casserole.[15]
  2. 2

    Leave it in the oven longer if there's only a little extra liquid. Sometimes the best way to thicken a casserole is to simply let the heat of the oven do the work. If you think it only needs to a little extra thickening, leave it in the oven for an extra 5-10 minutes.[16]

    • Check with the other ingredients in your casserole to make sure you can cook it a little longer. You don't want the top of the casserole to burn or the vegetables to get too soft if you leave it in the oven longer.
  3. 3

    Let your dish thicken as it cools if you don't plan to eat it right away. Your casserole will naturally thicken as it cools. If you plan to have leftovers, or you are making a casserole that you will refrigerate and eat later, letting it cool may be all you need to get the right thickness.[17]

    • If you already have an extra thick casserole that you want save for leftovers, remember to add a little broth or water to it before you store it since it will get even thicker as it cools.
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Sample Thickeners

List of Thickening Agents for Casseroles

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  • Question

    How can I thicken a casserole without using flour?

    Markeicha Dulaney
    Personal Chef

    Chef Markeicha Dulaney is a Personal Chef and Founder of Sweet Monáe Personal Chef Services in 2015 in South Florida. She has over 22 years of experience in the kitchen and provides customizable menus to meet the dietary needs, taste preferences, style, and budget of each client. She also specializes in weekly in-home chef services, all-inclusive pro-chef services, boutique catering, and pantry organizing services. She was featured in The Knot's "Table for Two" YouTube episodes and has also been featured in Real Simple Magazine article on "What routines save you the most time.” Chef Markeicha Dulaney graduated with an Associate's Degree from the Pennsylvania Culinary Institute of Culinary Arts and is a longtime member of the USPCA (United States Personal Chef Association).

    Markeicha Dulaney

    Personal Chef

    Expert Answer

    Consider the type of casserole you're preparing, such as a potato casserole. In this case, flour may not be necessary, as the potatoes themselves serve as a natural thickening agent. Layering the casserole with a touch of heavy cream and cheese further enhances its thickness without requiring any flour. For a sweet potato casserole where the potatoes are whipped or pureed, you can substitute flour with alternatives like coconut flour or oatmeal flour if there are allergy considerations in the recipe.

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      Tips

      • Try reducing your casserole before adding extra thickeners. If you already used a thickener in the cooking process, sometimes it just needs a little extra time to work. Give it an extra 10-15 minutes before you try to add anything else.[18]

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      • If you've found you've accidentally added too much of a thickening agent, do add more liquid to balance it out. Beware, however, that every time you add something to your casserole you're altering the flavor.[19]

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      Warnings

      • Don't just add flour or cornstarch or other dry goods to a hot casserole. It will not be able to dissolve fully and can make the sauce lumpy.[20]

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      • Don't estimate the amounts when making a slurry, roux, or beurre manié. Using equal parts butter and flour will give the best consistency to your casserole.[21]

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      Expert Interview

      Thanks for reading our article! If you’d like to learn more about cooking, check out our in-depth interview with Markeicha Dulaney.

      More References (12)

      1. https://www.saveur.com/ch-ch-ch-chia#page-2
      2. https://www.healthline.com/nutrition/substitutes-for-cornstarch#section6
      3. https://www.onegreenplanet.org/vegan-recipe/creamy-vegan-not-clam-chowder/
      4. https://www.onegreenplanet.org/vegan-recipe/creamy-vegan-not-clam-chowder/
      5. https://www.onegreenplanet.org/vegan-recipe/creamy-vegan-not-clam-chowder/
      6. https://www.deliaonline.com/how-to-cook/meat/the-principles-of-casserole-cookery
      7. https://www.onehappyhousewife.com/sweet-potato-casserole-instant-pot/
      8. https://blog.chefworks.com/uniforms/thicken-that-soup-or-sauce-the-right-way/
      9. https://blog.chefworks.com/uniforms/thicken-that-soup-or-sauce-the-right-way/
      10. https://blog.chefworks.com/uniforms/thicken-that-soup-or-sauce-the-right-way/
      11. https://blog.chefworks.com/uniforms/thicken-that-soup-or-sauce-the-right-way/
      12. https://blog.chefworks.com/uniforms/thicken-that-soup-or-sauce-the-right-way/

      About This Article

      4 Easy Ways to Thicken a Casserole - wikiHow (23)

      Co-authored by:

      Markeicha Dulaney

      Personal Chef

      This article was co-authored by Markeicha Dulaney. Chef Markeicha Dulaney is a Personal Chef and Founder of Sweet Monáe Personal Chef Services in 2015 in South Florida. She has over 22 years of experience in the kitchen and provides customizable menus to meet the dietary needs, taste preferences, style, and budget of each client. She also specializes in weekly in-home chef services, all-inclusive pro-chef services, boutique catering, and pantry organizing services. She was featured in The Knot's "Table for Two" YouTube episodes and has also been featured in Real Simple Magazine article on "What routines save you the most time.” Chef Markeicha Dulaney graduated with an Associate's Degree from the Pennsylvania Culinary Institute of Culinary Arts and is a longtime member of the USPCA (United States Personal Chef Association). This article has been viewed 69,155 times.

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      Co-authors: 10

      Updated: April 25, 2024

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      4 Easy Ways to Thicken a Casserole - wikiHow (2024)

      FAQs

      4 Easy Ways to Thicken a Casserole - wikiHow? ›

      The three main thickening agents for gravies are flour, cornflour and arrowroot. The first two are normally used in savoury dishes while arrowroot tends to be used in sweet dishes – that said, arrowroot will work in a savoury dish as it has no flavour.

      What is the best way to thicken a casserole? ›

      The three main thickening agents for gravies are flour, cornflour and arrowroot. The first two are normally used in savoury dishes while arrowroot tends to be used in sweet dishes – that said, arrowroot will work in a savoury dish as it has no flavour.

      How to fix a watery casserole? ›

      10 Tips To Fix Or Prevent Watery Casseroles
      1. Prep vegetables ahead of time. Solstock/Getty Images. ...
      2. Add a starch. NIKCOA/Shutterstock. ...
      3. Experiment with pasta or grains. Pidjoe/Getty Images. ...
      4. Take the lid off. ...
      5. Drain fat from meat. ...
      6. Choose a dry or low-fat cheese. ...
      7. Sprinkle seeds into your bake. ...
      8. Remove excess liquid.
      Oct 29, 2023

      How to make a liquid thicker without cornstarch? ›

      All-purpose flour: You can thicken sauces with all-purpose wheat flour. For every tablespoon of cornstarch, use three tablespoons of flour. Combine raw flour with cold water in a small bowl to form a paste, then add it into the sauce as it's simmering. Cooking the flour in the sauce will remove the flour taste.

      How to thicken without flour or cornstarch? ›

      Flour and Cornstarch Alternatives:
      1. 01 of 04. Arrowroot. This powder comes from rhizomes of the Marantaceae family of tubers. ...
      2. 02 of 04. Tapioca. Tapioca is derived from the cassava root. ...
      3. 03 of 04. Potato Starch. ...
      4. 04 of 04. Pureed Vegetables.
      Aug 24, 2023

      How to thicken casserole in the oven without flour? ›

      Starch- Cornstarch, potato, tapioca, rice, etc, all of these provide starch which, mixed with liquid and heated, gel and thicken. Fiber- Beans, onions, etc. Cooked and then mashed or blended will thicken a stew considerably.

      Does egg thicken casserole? ›

      Thicken with Eggs

      First you need to drizzle a small amount of the hot liquid onto the egg, whisking vigorously as you pour. Then stir the egg back into the pan and heat gently until it starts to thicken. This is a similar method to the one we use in our Carbonara recipe!

      What to do if casserole is too dry? ›

      How do you moisten a dry casserole? Add a little water or milk to the top of the it before reheating. Allow the liquid to seep in between the casserole and the baking dish, without overflowing. Cover the top with aluminum foil.

      How do you fix a dish that is too watery? ›

      Corn starch is a good way to thicken up the water into something more saucy. This is my preferred method if the extra water actually has flavor, because it adds a nice sauciness to the dish. Make a corn starch 'slurry' by mixing cold water and some corn starch, then add that to the hot dish that still cooking.

      How do you thicken watery food? ›

      The most readily available sauce-thickener is flour. For a too-thin sauce, try adding a slurry (equal parts flour and water, whisked together) or beurre manie (equal parts softened butter and flour, kneaded together to form a paste)—both are ideal thickeners for rich and creamy sauces, such as steak sauce recipes.

      What is a natural liquid thickener? ›

      If liquids are too thin, add one of the following common thickeners to get your liquid nectar-thick. Banana flakes. Cooked cereals (like cream of wheat or cream of rice) Cornstarch. Custard mix.

      How do you make homemade thickener? ›

      Combine equal parts cornstarch and cold water. Stir together until smooth. Pour into your sauce and cook over medium heat, stirring continually, until the sauce reaches your desired consistency. Test the sauce with a spoon.

      What else thickens besides cornstarch? ›

      Here are five of the best cornstarch substitutes for all your thickening needs.
      • All-Purpose Flour. Yep, that's right — all-purpose flour is a very stable thickener. ...
      • Arrowroot Powder. ...
      • Potato Starch. ...
      • Rice Flour. ...
      • Tapioca Starch.
      Jun 23, 2023

      What is the healthiest thickening agent? ›

      Easy-to-access alternatives are wheat flour, arrowroot flour, and rice flour. These are good alternatives to cornstarch because they are more nutritious and contain fewer carbohydrates and calories. Xanthan and guar gum are much stronger thickeners than cornstarch, but they can be harder to obtain and use.

      How to thicken sauce naturally? ›

      Ways To Thicken Sauce
      1. Tomato Paste. If your soup or stew is watery, adding tomato paste may help! ...
      2. Arrowroot. You might prefer to avoid gluten in your recipes. ...
      3. Flour. ...
      4. Reduce Your Liquid. ...
      5. Puréed Vegetables. ...
      6. Egg Yolk. ...
      7. Yogurt. ...
      8. Rice.
      Jul 15, 2022

      Will simmering sauce thicken it? ›

      Cook It Down

      Here's the easiest, though not the quickest, way to thicken your sauce: Just let evaporation do its thing. Adjust the heat so it keeps the sauce at a low simmer, then leave it uncovered to cook, stirring it every 5 minutes or so.

      How do you fix a casserole that is too dry? ›

      How do you moisten a dry casserole? Add a little water or milk to the top of the it before reheating. Allow the liquid to seep in between the casserole and the baking dish, without overflowing. Cover the top with aluminum foil.

      Is it better to thicken stew with flour or cornstarch? ›

      Cornstarch has twice the thickening power of flour. When a gravy, sauce, soup or stew recipe calls for flour, use half as much cornstarch to thicken. To thicken hot liquids, first mix cornstarch with a little cold water until smooth. Gradually stir into hot liquid until blended.

      How do you thicken baked goods? ›

      A dry mix of malted barley flour, wheat flour, and powdered milk, malted milk powder is commonly used to thicken milkshakes and baked goods.

      What does cornstarch do in a casserole? ›

      Use as a Thickening Agent

      Here's how it works: when cornstarch is added to a recipe, the starch molecules work to absorb water and thicken the mixture. When heated, those molecules swell and consume even more of the liquid in the recipe.

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