If you have one ripe banana and a serious chocolate craving, this might become your new favorite quick dessert.

These Banana Brownies are rich, chocolatey, soft in the center, and loaded with melty chocolate chips. The banana adds natural sweetness and moisture, while cocoa powder gives the brownies a deep chocolate flavor.

The best part? No traditional oven required. Mix everything directly in a microwave-safe dish and cook it in just a couple of minutes.

Prep time: 5 minutes

Cook time: 90 seconds–2 minutes

Total time: About 7 minutes

Servings: 2–4

🛒 Ingredients

For the Banana Brownies

• 1 large very ripe banana
• 1 large egg
• 3 tbsp unsweetened cocoa powder
• ½ tsp baking powder
• 1 small pinch of salt
• ¼ cup chocolate chips

Optional Toppings

• Melted dark chocolate
• Extra chocolate chips
• Banana slices
• Chopped walnuts or almonds
• Peanut butter
• Flaky sea salt

👩‍🍳 How to Make Banana Brownies Step by Step

Step 1 – Choose a Very Ripe Banana

Start with 1 large ripe banana.

For the best brownies, use a banana with plenty of brown spots on the skin. A very ripe banana is naturally sweeter, softer, and easier to mash.

It also adds moisture, which helps create that desirable soft and fudgy brownie center.

Peel the banana and slice it into small pieces.

Step 2 – Prepare Your Baking Dish

Choose a small microwave-safe glass or ceramic baking dish.

Line the inside with parchment paper, leaving a little extra paper around the edges. This makes it much easier to lift the brownie out after cooking.

Place the sliced banana directly into the prepared dish.

Step 3 – Mash the Banana

Using a fork, mash the banana thoroughly.

Continue pressing and stirring until it becomes soft, creamy, and mostly smooth.

Try to remove any large banana chunks.

The smoother your banana base is, the more evenly it will combine with the remaining ingredients.

Step 4 – Add the Egg

Crack 1 large egg directly into the mashed banana.

The egg helps bind everything together and gives the brownie enough structure to hold its shape after cooking.

Use your fork to lightly break the yolk, but don’t fully mix everything yet.

Step 5 – Add the Cocoa Powder

Add 3 tablespoons unsweetened cocoa powder.

For an intense chocolate flavor, choose a good-quality unsweetened cocoa powder.

If your cocoa is particularly lumpy, sift it before adding it to the banana mixture.

Step 6 – Add Baking Powder and Salt

Sprinkle in:

• ½ teaspoon baking powder
• 1 small pinch of salt

The baking powder gives the brownie just enough lift while cooking.

Don’t add too much—you still want a dense, moist brownie, rather than a fluffy chocolate cake.

The pinch of salt helps balance the sweetness of the banana and intensifies the chocolate flavor.

Step 7 – Mix Until Smooth 🍫

Now use a fork or small whisk to combine everything.

Mix in circular motions until the banana, egg, cocoa powder, baking powder, and salt become a uniform chocolate batter.

Scrape the sides and bottom of the dish as you mix.

The finished batter should look:

Thick + dark chocolate + smooth + glossy.

You shouldn’t see large streaks of egg or pockets of dry cocoa powder.

Step 8 – Add the Chocolate Chips

Sprinkle approximately ¼ cup chocolate chips evenly across the surface.

You can gently press some into the batter while leaving the rest on top.

This gives you little pockets of melted chocolate throughout the brownie while keeping those beautiful glossy chocolate chips visible on the surface.

And if you’re a serious chocolate lover, adding a few extra chips is rarely a bad idea. 🍫

Step 9 – Microwave the Brownie

Place the dish into the microwave.

Cook on high for approximately 90 seconds to 2 minutes.

Because microwave wattages vary, I recommend checking around the 90-second mark.

You’ll notice the brownie rise and puff slightly as it cooks.

The surface should transition from wet batter to a mostly set brownie, while the chocolate chips become warm, soft, and glossy.

Don’t Overcook It!

This is the most important part of the recipe.

If you want that moist, fudgy center, don’t keep microwaving until the brownie becomes completely dry.

The center should be set enough to eat safely, but the brownie should still feel soft and moist.

If necessary, continue microwaving in 10–15 second increments.

Step 10 – Let It Rest

Carefully remove the baking dish from the microwave—it may be very hot.

Allow the brownie to rest for approximately 2–3 minutes.

This gives the center time to finish setting and also makes the brownie easier to remove from the dish.

Step 11 – Remove the Brownie

Hold the exposed edges of the parchment paper and carefully lift the brownie from the baking dish.

Transfer it to a cutting board or serving plate.

Gently peel away the parchment.

At this point, the chocolate chips on top should still look slightly melted and glossy. 🤤

Step 12 – Cut Into Brownie Squares

Using a sharp knife, cut the brownie into small squares.

For cleaner cuts, wipe the knife between slices.

But don’t worry if the edges aren’t absolutely perfect—these brownies are supposed to look soft, rich, and homemade.

Step 13 – Add Melted Chocolate 🍫

For an extra indulgent finish, melt a little dark chocolate and drizzle it over the warm brownie squares.

You can also add:

Chocolate chips + chopped nuts + banana slices + flaky sea salt.

If you love chocolate and peanut butter together, drizzle a little warm peanut butter over the top.

Step 14 – The Fudgy Texture Reveal

Now for the best part.

Take one brownie square and gently break it open or press a spoon into the center.

The outside should hold its shape, while the inside remains soft, moist, rich, and fudgy.

You should see little pockets of warm melted chocolate throughout the banana-chocolate center.

Take a spoonful and bring it close—you want that gorgeous contrast between the dark brownie crumb and glossy melted chocolate.

⭐ Tips for the BEST Banana Brownies

Use an extra-ripe banana. This is where much of the sweetness comes from.

Use unsweetened cocoa powder. It gives you a deeper chocolate flavor without adding unnecessary sweetness.

Don’t overdo the baking powder. Too much will turn your fudgy brownie into a fluffy cake.

Use a small dish. If your baking dish is too large, the batter will spread too thin and may dry out quickly.

Watch your microwave carefully. Cooking time can vary significantly depending on microwave power.

Let the brownie rest before cutting. A couple of minutes makes a big difference.

Eat it warm. That’s when the chocolate chips are still soft and melty.

🥜 Delicious Variations

Peanut Butter Banana Brownies

Swirl 1–2 tablespoons creamy peanut butter into the batter before microwaving.

Banana + peanut butter + chocolate is always a winning combination.

Double Chocolate Banana Brownies

Mix half the chocolate chips directly into the batter and sprinkle the remaining half on top.

Then finish with melted dark chocolate.

Banana Walnut Brownies

Add 2 tablespoons chopped walnuts for extra crunch.

Chocolate Almond Banana Brownies

Mix chopped roasted almonds into the batter and finish with a small drizzle of almond butter.

Salted Chocolate Banana Brownies

Add a tiny pinch of flaky sea salt over the warm melted chocolate immediately before serving.

The salty-sweet contrast works beautifully with banana.

🍨 How to Serve Banana Brownies

These brownies are delicious straight from the microwave, but you can easily turn them into a more impressive dessert.

Serve one warm brownie square with Greek yogurt, fresh banana slices, strawberries, or a scoop of vanilla ice cream.

Then drizzle a little melted dark chocolate over everything.

Warm brownie + cold ice cream + melted chocolate = perfection. 🍫🍨

❄️ How to Store Them

If you have leftovers, allow the brownies to cool completely.

Place them in an airtight container and refrigerate for up to 2–3 days.

To serve them warm again, microwave an individual piece briefly until just heated through.

Avoid reheating for too long because the brownie can become dry.

❤️ Why You’ll Love This Banana Brownie Recipe

You don’t need complicated equipment or a long list of ingredients.

The entire process is basically:

Mash → Add → Mix → Sprinkle → Microwave → Slice → Enjoy!

In just a few minutes, you get a warm chocolate dessert combining the natural sweetness of ripe banana with rich cocoa and pockets of melted chocolate.

And when you cut into it while it’s still warm and reveal that soft, fudgy chocolate-banana center… that’s the bite worth saving the recipe for. 🤤🍌🍫

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