I remember first making these flourless brownies on a rainy afternoon when the grocery store was closed and I had only bananas, peanut butter, and cocoa in the pantry. The result was shockingly fudgy and chocolatey—three ingredients, no flour, no fuss. This recipe is perfect when you want a quick, naturally gluten-free treat that still tastes indulgent. If you’re exploring other fudgy brownie ideas, you might like our Black Forest Brownies variation for a cherry-topped twist.

Why you’ll love this dish

This recipe shines because it’s fast, economical, and forgiving. Ripe bananas and peanut butter act as the structure and binder so you don’t need flour or eggs. That makes it a great option for busy weeknights, school bake sales, or when you want a dessert that’s naturally gluten-free. Kids tend to love the sweetness and fudgy texture, and the simple ingredient list means it’s easy to adapt if someone has pantry restrictions.

Step-by-step overview

You’ll mash ripe bananas, stir in peanut butter and cocoa until smooth, press the batter into a prepared pan, and bake for about 20 to 25 minutes. The batter is dense and spreadable, so no mixer is required—just a bowl and a spoon. Cooling is important: the brownies set as they cool, giving you that clean-cut square.

What you’ll need

• 3 ripe bananas (the riper, the sweeter and more chocolaty)
• 1 cup peanut butter (smooth or crunchy; natural or commercial will both work)
• 1/2 cup unsweetened cocoa powder

Notes and substitutions: use almond or cashew butter if you prefer a different nut flavor. For a nut-free version, substitute sunflower seed butter. If your peanut butter is unsweetened, add 1–2 tablespoons of maple syrup or honey to taste. Dutch-processed cocoa will give a darker, smoother chocolate note, while natural cocoa tastes tangier.

How to prepare it

1. Preheat the oven to 350°F (175°C). Grease a small baking pan (8×8 inches works well) or line it with parchment for easy removal.
2. In a large mixing bowl, mash the ripe bananas with a fork until mostly smooth and free of large lumps.
3. Add the peanut butter and cocoa powder to the mashed bananas. Stir with a spatula until the mixture is homogeneous and glossy. Scrape the bowl to incorporate any dry pockets of cocoa.
4. Transfer the batter to the prepared pan and smooth the top with a spatula so it bakes evenly.
5. Bake for 20 to 25 minutes. A toothpick inserted into the center should come out mostly clean with a few moist crumbs—avoid overbaking to keep the fudgy texture.
6. Remove from the oven and allow the brownies to cool completely in the pan before cutting into squares.

Best ways to enjoy it

Serve the brownies slightly warm with a scoop of vanilla ice cream, or let them cool and dust with a little powdered sugar and flaky sea salt. For a brunch-style plate, slice into squares and add fresh berries and yogurt on the side. If you want a fruit-forward idea, try pairing a square with our chocolate-covered strawberry brownies for an elegant dessert board that highlights chocolate and fruit together.

Storage and reheating tips

Store cooled brownies in an airtight container at room temperature for up to 2 days. For longer keeping, refrigerate for up to 5 days—bring to room temperature before serving for the best texture. To freeze, wrap individual squares tightly in plastic wrap and place in a freezer bag for up to 3 months; thaw in the refrigerator overnight and warm briefly in the microwave or oven. Practice safe food handling: discard any brownies that smell off or show mold.

Helpful cooking tips

• Use very ripe bananas with brown speckles for maximum sweetness and banana flavor.
• If your peanut butter is very thick, warm it slightly to make mixing easier.
• Line the pan with parchment and leave an overhang for easy lifting.
• Do not overmix; overworking the batter can make the texture dense rather than fudgy.
• Check doneness at 20 minutes because oven temperatures vary; the center should be set but moist.
• Add a pinch of flaky salt on top right after baking to contrast the sweetness.

Creative twists

• Chocolate chip swirl: fold in 1/3 cup of chocolate chips before baking for melty pockets.
• Spiced: add 1/2 teaspoon cinnamon and a pinch of cayenne for warmth and depth.
• Nutty crunch: stir in chopped toasted pecans or walnuts for texture.
• Boosted protein: mix in a tablespoon of cocoa protein powder or a scoop of nut-free protein powder—add a splash of milk if the batter looks too stiff.
• Maple-sweetened: swap 1–2 tablespoons of peanut butter for an equal amount of maple syrup if you want a looser, sweeter batter.

FAQ

How long does this take to make from start to finish?

Hands-on time is about 10 minutes for mashing and mixing. Bake time is 20 to 25 minutes, plus cooling time of at least 20 to 30 minutes before cutting. Plan for roughly an hour total if you want fully cooled squares.

Can I make this without peanut butter?

Yes. Substitute almond butter, cashew butter, or sunflower seed butter for a nut-free option. Texture and flavor will change slightly, so check sweetness and add a teaspoon of sweetener if needed.

Are these truly gluten-free and vegan?

Yes, with these ingredients the brownies are naturally gluten-free and vegan. Ensure your cocoa powder and peanut butter are labeled gluten-free if you need strict gluten avoidance.

Can I add sugar if I want them sweeter?

Absolutely. If you prefer sweeter brownies, stir in 1–2 tablespoons of maple syrup, honey (not vegan), or brown sugar to taste before baking. Liquid sweeteners may slightly change baking time, so watch for doneness.

What if my batter looks too runny or too thick?

Batter should be dense but spreadable. If it’s too runny, add a tablespoon of cocoa or a small amount of oat flour to thicken. If too thick, stir in a teaspoon of plant milk or a little more mashed banana to loosen.

Flourless Brownies

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Indulge in these fudgy and chocolatey flourless brownies made with just three ingredients: bananas, peanut butter, and cocoa powder.

• Prep Time: 10 minutes
• Cook Time: 25 minutes
• Total Time: 45 minutes
• Yield: 16 servings 1x
• Category: Dessert
• Method: Baking
• Cuisine: American
• Diet: Vegan, Gluten-Free

Ingredients

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• 3 ripe bananas
• 1 cup peanut butter
• 1/2 cup unsweetened cocoa powder

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Instructions

1. Preheat the oven to 350°F (175°C) and grease a small baking pan or line with parchment paper.
2. Mash the ripe bananas in a large mixing bowl until mostly smooth.
3. Add the peanut butter and cocoa powder to the mashed bananas and stir until well combined.
4. Transfer the batter to the prepared pan and smooth the top.
5. Bake for 20 to 25 minutes or until a toothpick inserted comes out mostly clean.
6. Remove from the oven and let the brownies cool completely before cutting into squares.

Notes

For nut-free alternatives, try sunflower seed butter. Adjust sweetness by adding maple syrup if using unsweetened peanut butter.

Nutrition

• Serving Size: 1 square
• Calories: 180
• Sugar: 5g
• Sodium: 150mg
• Fat: 10g
• Saturated Fat: 2g
• Unsaturated Fat: 8g
• Trans Fat: 0g
• Carbohydrates: 22g
• Fiber: 3g
• Protein: 5g
• Cholesterol: 0mg