Fudgy Three-Ingredient Banana Brownies

Fudgy three-ingredient banana brownies made in one bowl with ripe bananas, cocoa, and peanut butter. A quick, flourless vegan dessert.

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Prep Time 10 minutes mins

Cook Time 25 minutes mins

Total Time 35 minutes mins

Servings: 1

Course: Desserts

Cuisine: American

Calories: 122

Ingredients Method Nutrition Notes

Ingredients

  

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• 3 large ripe bananas about 1 1/2 cups/360 ml mashed
• 4 tablespoons unsweetened cocoa powder 1/4 cup
• 1/2 cup unsalted creamy peanut butter natural style, about 4 1/2 oz/128 g

Optional for a boost of sweetness

• 1/2 cup dairy-free dark chocolate chips plus extra for sprinkling on top

Method

 

1. Preheat the oven to 350°F (180°C). Line a 6-inch square brownie pan with parchment paper, leaving a little overhang, and lightly grease the paper and pan with avocado oil or another neutral oil.
2. In a large bowl, mash the ripe bananas with a fork or potato masher until they form a smooth, mostly lump-free puree.
3. Add the peanut butter and cocoa powder, then stir with a spatula until the mixture comes together like a thick brownie batter. It is okay if a few small banana bits remain; if the batter looks dry, add another spoonful of mashed banana or a splash of almond milk.
4. Fold in the dairy-free dark chocolate chips, if using, and scrape the batter into the prepared pan. Smooth the top with the spatula and sprinkle on extra chips if desired.
5. Bake for 25 to 30 minutes, until the center looks set and a toothpick inserted into the middle comes out with just a few moist crumbs.
6. Transfer the pan to a wire rack and let the brownies cool in the pan for about 10 minutes.
7. Lift the brownies out using the parchment overhang, set them on the rack to cool for at least 20 minutes, then slice into 9 squares and serve.

Nutrition

Calories: 122kcalCarbohydrates: 12.7gProtein: 4.4gFat: 7.6gSaturated Fat: 1.6gSodium: 1mgFiber: 2.6gSugar: 6.1g

Notes

Use very dark, spotty bananas; the riper they are, the sweeter your brownies will be.

If the batter looks dry, add a spoonful of extra mashed banana or a splash of almond milk rather than more peanut butter.

Substitute almond butter or sunflower seed butter for the peanut butter, and choose unsalted versions for the most balanced flavor.

Fold in the 1/2 cup of dairy-free dark chocolate chips or a handful of chopped walnuts if you want a sweeter, richer brownie.

Bake just until a toothpick comes out with a few moist crumbs; overbaking makes these dense and dry instead of fudgy.

Store the cooled brownies in an airtight container in the refrigerator for up to 4 days; they get even fudgier when chilled.

Serve them chilled or at room temperature, alone or topped with coconut yogurt or a spoonful of nut butter.

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Why These 3 Ingredient Banana Brownies Work

Labor Day weekend is basically here, and I have a feeling I know what’s sitting on your kitchen counter. A bunch of bananas. The ones you bought for the kids, now speckled and soft and one day away from becoming fruit fly real estate. Don’t let them go to waste. You’re about to turn them into the fudgiest 3 ingredient banana brownies of your life.

Three ingredients. Zero excuses. When someone first told me you could make brownies with just ripe bananas, cocoa powder, and peanut butter, I rolled my eyes so hard I nearly pulled something. Then I tried it. Honestly? I’ve been making these 3 ingredient banana brownies every single week since.

These 3 ingredient banana brownies are flourless brownies, egg-free brownies, and dairy-free brownies all at once. No refined sugar needed, no oil, no strange specialty ingredients. Just one bowl, one spatula, done. This quick dessert recipe is the one you’ll memorize after a single try.

Here’s why they work:

• Bananas do triple duty. They bring the sweetness, the moisture, and the binding. No eggs required.
• Peanut butter brings the fat. That’s what makes these fudgy instead of cakey.
• Cocoa powder brings the chocolate. Four tablespoons of unsweetened cocoa and you’d never guess fruit is hiding in there.

I’ve been wrong about a lot of baking experiments (ask my husband about my vegan cheese phase). This one? Not wrong. In about 35 minutes, you’ll be eating these, which is still faster than DoorDash on a holiday weekend.

Ingredients You’ll Need

Here’s the thing about a simple 3 ingredient banana brownies recipe. Every ingredient actually matters. You can’t hide behind a wall of flour and sugar, so ripeness and quality do the heavy lifting.

• 3 large ripe bananas: About 1 1/2 cups once mashed. You want them spotty, soft, almost ugly. Riper means sweeter, and this overripe banana recipe depends on that.
• 4 tablespoons unsweetened cocoa powder: A full quarter cup. This is your chocolate backbone.
• 1/2 cup unsalted creamy peanut butter: Natural style works best. Choose unsalted so the chocolate flavor stays balanced.

Optional but very recommended: half a cup of dairy-free dark chocolate chips. They add sweetness and turn these gluten-free brownies from great to dangerous.

How to Make Three-Ingredient Banana Brownies

This is a one bowl operation, so the cleanup is basically a joke. Grab a 6-inch square pan, line it with parchment paper, and give the paper a light grease. You’ll be done with the active work before your coffee cools.

Stage 1: Mash the bananas. This is your whole workout. Use a fork or a potato masher and go until you have a smooth, mostly lump-free puree. The best 3 ingredient banana brownies start with bananas you actually took the time to mash properly.

Stage 2: Add the peanut butter and cocoa powder. Stir with a spatula until everything comes together like a thick brownie batter. It’ll look dark, glossy, and deeply chocolatey. If it looks dry, add a spoonful of extra mashed banana or a splash of almond milk. Don’t add more peanut butter, it throws off the balance.

Stage 3: Fold in the chocolate chips and fill the pan. Fold gently, then scrape the batter into your lined pan. Smooth the top and sprinkle on a few extra chips, because you deserve nice things. This is where banana cocoa brownies become dangerously good.

Stage 4: Bake until just set. Bake at 350°F for 25 to 30 minutes. The center should look set, and a toothpick should come out with a few moist crumbs. Not clean. Moist. Trust me on this one, that’s the difference between fudgy brownies and a dry brick. Cool in the pan for 10 minutes, lift out with the parchment overhang, and cool for at least 20 more before slicing into 9 squares.

Expert Tips for Perfect Banana Brownies

After several batches (and one gummy one I refuse to discuss), I’ve learned a few things. Here’s what I wish I’d known from day one.

• Use very dark, spotty bananas. The riper the banana, the sweeter the brownie. That’s your entire sweetness strategy with no refined sugar.
• Don’t overbake. Overbaking is the number one way to ruin these. Check at 25 minutes and trust the moist crumbs.
• Stir your peanut butter well. Natural peanut butter separates. Give it a good stir before measuring so the batter comes together smoothly.
• Chill them. These 3 ingredient banana brownies get even fudgier in the fridge, which hits different when it’s 90 degrees outside.

Common mistakes, in case you’re in a hurry:

• ❌ Using small or green bananas → ✅ Wait for spotty ones. Small bananas make dry brownies.
• ❌ Overbaking → ✅ Check at 25 minutes and pull them while the center is still soft.
• ❌ Forgetting to grease the parchment → ✅ Lightly oil the paper so they release without a fight.

Variations and Add-Ins

One of the best things about this easy baking recipe is how flexible it is. Swap things around and it still works.

• Nut butter swaps: Almond, cashew, or hazelnut butter all work. For a nut-free version, use sunflower seed butter or tahini. Just choose unsalted.
• A little crunch: Fold in a handful of chopped walnuts or pecans instead of chocolate chips.
• Extra sweetness: If your bananas aren’t ripe enough, add a spoonful of maple syrup. Otherwise the chocolate chips handle it.

The base stays true to its simple 3 ingredient dessert promise. Everything else is just a bonus. And if you need a vegan brownie option, this is it.

How to Store and Freeze Banana Brownies

Store the cooled brownies in an airtight container in the fridge for up to 4 days. They honestly get fudgier when chilled, so this is a reward, not a compromise. On a hot day, I pull one straight from the fridge and call it dessert.

You can also freeze them for up to 3 months. Slice first, stack with a little parchment between layers, and thaw in the fridge or warm them in a hot oven for a couple of minutes.

Pack them for the Labor Day cookout and watch them disappear before the burgers come off the grill. Better than a store-bought pie, and nobody has to know it took you five minutes of actual effort.

How to Serve Banana Brownies

These are perfect on their own, but if you want to get fancy, top a square with a spoonful of nut butter or a scoop of coconut yogurt. They’re also fantastic with a cup of coffee or tea. Serve chilled or at room temperature.

And honestly, the kids won’t question them. Chocolate masks the banana completely. That’s the quiet parenting win I live for. A pantry staple dessert that feels like a treat but is secretly a clean eating dessert, which makes these one of the best kid-friendly treats I know.

Frequently Asked Questions

So there you have it. Three ingredients, one bowl, and a pan of fudgy brownies that’ll make you look like a hero at the last cookout of the summer.

When you make these 3 ingredient banana brownies for the first time, come find me on Pinterest. I pin the stuff I actually make at home, and I want to see your brownies. Tag me, tell me how they turned out. I’m serious.

You’ve got three ingredients and zero excuses. Go. Your bananas are waiting.

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