How to Roast Sweet Potatoes That Are Charred on the Outside and Pudding-y in the Middle (2024)

The only thing better than a good recipe? When something's so easy to make that you don't even need one. Welcome to It's That Simple, a column where we talk you through the process of making the dishes and drinks we can make with our eyes closed.

I want to shout my love for sweet potato recipes from every corner of this here internet. I don't save them for fall, or for "sweater season," or for Thanksgiving. I eat sweet potatoes on the hottest days of summer and the rainiest days of spring. I don't discriminate between the varieties (though Japanese are the best TBH). I like them steamed, fried, braised, sautéed, and—on most nights of the week—roasted.

It couldn't be much simpler to do and—since my friends regularly text me to ask me my "secrets"—I'm going to lay it all out now. (This one's for you, Mackenzie.) But first, a disclaimer. People seem to be clamoring for "crispy" roasted sweet potatoes, to which I respond, "They don't exist!" I've made plenty of charred, deeply browned roasted sweet potatoes in my life, but none have been crispy or crunchy—you'd need to fry or dehydrate for that. The best you're going to get is a burnished exterior and a custardy middle, and once you've accepted that reality, you're ready to roast.

Start by heating your oven—I aim for somewhere in the 400° to 450° range regardless of whether I'm roasting the sweet potato whole, halved, or sliced. While the oven comes to temperature, scrub your sweet potato with a vegetable brush or designated sponge (or, worst case scenario, a paper towel). Remember, these tubers were ripped from the ground, after which they spent a fair amount of time hanging out in transit and in your grocery store. They're dirty! Washing the sweet potatoes not only eliminates actual particles of dirt, but it also introduces some moisture to the skin, which prevents it from turning tough or leathery in the high heat of the oven.

How to roast whole sweet potatoes:

If you're going to roast the sweet potato whole—say you're planning split it open and dress it liked a baked potato—coat it in a little olive oil and sprinkle it with salt. This is for taste purposes only, so if you're going to peel the skin off and mash the flesh, don't bother. Stick the potato on a baking sheet in the oven—no need to wrap it or prick it—and cook until it's totally tender: A cake tester should pierce the skin and slide through the soft center. Depending on the size of your potato and the heat of your oven, this can take anywhere from 40 to 60 minutes.

How to roast cut sweet potatoes:

But let's say you want to cut the sweet potato—down the middle into two halves, or into wedges, rounds, or big pieces. Do your knife work, then toss the pieces with a generous amount of oil (oil conducts heat, which increases browning) and season with salt and whatever spices you'd like: I often go with smoked paprika or a mix of ground coriander, cumin, and turmeric.

How to Roast Sweet Potatoes That Are Charred on the Outside and Pudding-y in the Middle (2024)

FAQs

Why are my roasted sweet potatoes not crispy? ›

I've found that sweet potatoes really need space for a truly roasted, crisped-edge result. Aim for about one inch of space between pieces. This leads to good, dry, hot airflow that will let the potato pieces' moisture evaporate while letting them dry and crisp up more.

Why do sweet potatoes go black when roasting? ›

One of the phenols, called chlorogenic acid, is the culprit that makes sweet potatoes, and sometimes, regular potatoes darken when they're cooked. The chlorogenic acid combines with iron ions in the potato and oxygen absorbed from the atmosphere and cooking water, creating the dark pigment.

Is it better to boil or roast sweet potatoes? ›

The takeaway. If you want to eat sweet potatoes and maintain blood sugar balance, Sapola suggests boiling rather than roasting them. This method will take the glycemic index impact down a few points and maybe even challenge your cooking creativity.

How to prevent cut sweet potatoes from browning? ›

It is not necessary to peel sweet potatoes, but you can. How do you prevent sweet potatoes from browning? After cutting sweet potatoes, the easiest way to prevent browning is to submerge them in water. You can store them in water in the fridge for 3-4 days in advance.

Do you soak sweet potatoes before baking? ›

3. Do I need to soak sweet potatoes before baking? Many readers ask if they really need to soak the sweet potatoes before baking to get that great crunch. I've tried it both ways and found that soaking the sweet potato fries for about 30 minutes or so in plenty of cold water does help them crisp up a bit more.

Why does vinegar make potatoes crispy? ›

The acid in the vinegar can also help to slightly break down the surface of the potatoes, aiding in the development of a crispier texture during frying. Additionally, the vinegar can contribute to a golden-brown color on the exterior of the fries.

Do sweet potatoes get sweeter the longer you cook them? ›

You can control the amount of maltose produced when cooking sweet potatoes by varying the cooking time. The longer and slower you cook a sweet potato, the more maltose is formed and the sweeter it will taste.

Why are my roasted sweet potatoes soggy? ›

The main reasons for soggy sweet potato wedges are: overcrowding the baking sheet, not tossing in enough oil, having too thick sized wedges, and not roasting at a high enough heat.

How do you make sweet potatoes not turn black? ›

Try putting each potato in cold water while you peel the rest. I do this with both whole and cut potatoes. You can add some acid to the water if you like, but it's not really necessary. Starch from the potato will blacken/bruised when exposed to air.

Can you cut sweet potatoes ahead of time for roasting? ›

As such, it's a great idea to cut and prepare your raw sweet potatoes ahead of time. This way, you can quickly throw the potatoes in the oven — or on the stove — whenever a craving strikes.

Will olive oil keep potatoes from turning brown? ›

When slicing the potatoes place into water with a little acidity to keep them from turning gray. A small amount of white wine vinegar of lemon will do the trick. Then drain and place the potatoes in foil along with your spices and some olive oil or vegetable oil.

Why can't i get my roast potatoes crispy? ›

Preheat the fat. While the potatoes parboil, add the oil or butter to the roasting pan, transfer it to the warm oven, and heat it for about 5 minutes before adding the potatoes. This allows the outside of the potatoes to crisp up nicely and not just absorb the cold fat when you put them in the oven.

Why are my sweet potatoes still hard after baking? ›

If the potato is still firm when squeezed, that means it needs to cook more. Baked sweet potatoes can be stored in an airtight container in the refrigerator for up to 5 days. Reheat for 2 minutes in the microwave, at 400°F in the air fryer for 5 minutes, or at 400°F in the oven for 10 minutes.

Why are my oven roasted potatoes soggy? ›

Roasted potatoes can become soggy if the water content in the potato isn't fully cooked. Different potatoes have different water content percentages. Also, be mindful of the oil. Potatoes can react like sponges; too much oil can make your potatoes appear to be soggy.

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