Recipe

Sweet Potato Brownies

Thick, fudgy brownies made with mashed sweet potato for extra moisture and a cozy flavor boost.

By Matt Campbell

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4.8

A stack of fudgy sweet potato brownies with crackly tops and chocolate chunks on a rustic plate on a warm kitchen table

If you have ever bitten into a brownie and thought, this is good but it could be fudgier, sweet potato is about to become your sneaky little kitchen ally. These sweet potato brownies are rich and chocolate-forward, with that glossy, crackly top and the kind of moist center that makes you cut “just one more sliver” until the pan is mysteriously gone.

They do not taste like vegetable brownies. They taste like brownies that had their life together. Sweet potato adds moisture and a subtle caramel vibe that plays really nicely with cocoa. No blender required, no hard-to-find ingredients, and yes, you can absolutely use leftover baked sweet potato from last night’s dinner (as long as it was baked plain).

Measured baking ingredients on a light kitchen counter including mashed sweet potato, cocoa powder, flour, sugar, eggs, butter, and chocolate chips in small bowls

Why It Works

Fudgy texture without fuss: sweet potato makes these brownies more forgiving, helping the center stay softer and richer.
Big chocolate flavor: cocoa powder plus chocolate chips gives you depth and those melty pockets.
Crisp edges, soft middle: baking in an 8-inch pan makes them thick, with the perfect contrast.
Easy to make ahead: these slice cleaner after a chill, which is great for lunches, bake sales, or “I need a treat at 9 pm.”

Pairs Well With

Storage Tips

Room temperature

Store sliced brownies in an airtight container in a cool, dry place for up to 2 to 3 days. If your kitchen runs warm or humid, refrigerate after 1 to 2 days. Place parchment between layers to keep the tops pretty.

Refrigerator

For extra fudgy, almost-truffle vibes, refrigerate up to 6 days. Let a piece sit at room temp for 10 minutes before eating, or warm it gently.

Freezer

Freeze individual squares for up to 2 months. Wrap tightly, then stash in a freezer bag. Thaw in the fridge overnight or on the counter for about an hour.

Warm-up move: 10 to 15 seconds in the microwave gives you molten chips again. Worth it.

Common Questions

Do sweet potato brownies taste like sweet potato?

Not in a “side dish” way. The cocoa and chocolate dominate. Sweet potato mainly brings moisture and a gentle caramel sweetness.

Can I use canned sweet potato puree?

Yes. Use plain canned sweet potato with no added syrup or spices. If it seems watery, strain it in a fine-mesh sieve for a few minutes (or simmer it briefly to thicken), then measure.

What is the best way to cook the sweet potato for this recipe?

Baking or roasting gives you the best flavor and the least water. Bake a medium sweet potato at 400°F for 45 to 60 minutes (until very soft), cool, then scoop and mash. If you microwave it, let the flesh steam off for a few minutes so your batter does not get too wet.

Why did my brownies turn out cakey?

Usually it is one of three things: too much flour, overmixing after adding flour, or overbaking. For fudgy brownies, mix gently and pull them when the center still looks a little soft.

Can I make these dairy-free?

Yes. Swap the butter for melted coconut oil or a neutral oil. Use dairy-free chocolate chips.

Can I make these gluten-free?

Swap the all-purpose flour for a 1:1 gluten-free baking blend. Texture can be slightly softer, but still very brownie-like.

Matt Campbell

I have always had a huge passion for the culinary arts, people, working as a team, and so on. I wanted to pursue my love for cooking initially at Virginia Commonwealth University with a culinary arts degree; however, I instead decided to apply myself and acquire more practical skills. My end goal is to eventually open my own restaurant or similar establishment.

Kitchen Essentials

8 x 8-inch baking pan
Parchment paper
Large mixing bowl
Whisk
Rubber spatula
Measuring cups and spoons
Wire rack for cooling

I started making these because I kept ending up with one lonely baked sweet potato in the fridge, the culinary equivalent of a single sock. One night I mashed it, tossed it into brownie batter as a “why not,” and accidentally made a batch that disappeared faster than any from-a-box situation I have ever put on a counter. Now it is my favorite move when I want dessert that feels cozy and a little clever, without getting precious about it. Also, the smell while they bake is basically a dinner bell for everyone in the house.

Sweet Potato Brownies

(4.8 Reviews)

Prep Time 15 minutes

Cook Time 28 minutes

Total Time 43 minutes

Servings 9 brownies

Ingredients

1 cup mashed sweet potato (measured after cooking, cooling, and mashing; about 1 medium sweet potato)
1/2 cup unsalted butter, melted and slightly cooled
3/4 cup granulated sugar
1/4 cup light brown sugar, packed
2 large eggs, room temperature
2 teaspoons vanilla extract
3/4 cup unsweetened cocoa powder
1/2 cup all-purpose flour
1/2 teaspoon kosher salt
1/2 teaspoon baking powder
3/4 cup semi-sweet chocolate chips (plus a handful for the top)

Optional but fun: 1/2 teaspoon instant espresso powder (add with dry ingredients), or 1/2 teaspoon cinnamon (add with dry ingredients), or 1/2 cup chopped toasted walnuts (fold in with the chips).

Instructions

Heat the oven and prep the pan. Preheat to 350°F. Line an 8 x 8-inch pan with parchment, leaving a little overhang so you can lift the brownies out later. A quick swipe of butter or spray under the parchment helps it stay put, and a light grease on top of the parchment is helpful for extra clean corners.
Cook the sweet potato (if you have not already). Bake a medium sweet potato at 400°F for 45 to 60 minutes until very soft. Cool completely, then scoop out the flesh. (Skip any dinner-style add-ons like butter, salt, or spices.)
Make sure your sweet potato is smooth. Mash until mostly lump-free. A few tiny lumps are fine, but big chunks will bake into odd pockets. Measure 1 cup after mashing.
Whisk the wet ingredients. In a large bowl, whisk together mashed sweet potato, melted butter, granulated sugar, and brown sugar until smooth and well combined.
Add eggs and vanilla. Whisk in the eggs one at a time, then whisk in vanilla. Give it a solid 20 to 30 seconds of whisking here. It helps dissolve the sugar and encourages that shiny, crackly brownie top.
Add the dry ingredients. Sprinkle in cocoa powder, flour, salt, and baking powder (plus espresso powder or cinnamon, if using). Switch to a spatula and fold just until you do not see dry streaks. Do not overmix.
Fold in chocolate chips. Stir in 3/4 cup chocolate chips (and walnuts, if using). Batter will be thick, like scoopable frosting. That is exactly what you want.
Pan it up. Spread batter evenly into the prepared pan. Sprinkle a handful of extra chocolate chips on top and press them in lightly so they do not roll off later.
Bake. Bake for 25 to 32 minutes, until the edges look set and slightly pulled from the sides. The center should look set on top but still soft. A toothpick should come out with moist crumbs, not wet batter.
Cool, then slice. Cool in the pan for 20 minutes, then lift out using the parchment and cool fully on a rack before slicing, about 1 to 2 hours. For the cleanest cuts, chill for 30 minutes first.