Easy One-Bowl Banana Chocolate Chip Cake

This banana chocolate chip cake comes together in one bowl with a fork and takes about 10 minutes of hands-on work. It’s soft, tender, and loaded with melty chocolate in every bite.

No mixer, no fuss. Just the kind of cake you make when the bananas on your counter are too speckled to ignore, and you need something warm from the oven without a pile of dishes.

What Makes This Banana Cake So Good

Brown sugar and melted butter keep the crumb velvety without any creaming. Even a day later, it stays just as moist as the first slice.

Banana and chocolate are an obvious pair, but here the chips don’t just sit on top. They sink into the batter just enough to give you dark little pockets in every slice. It’s a quick bread that eats like cake.

Ingredients

• 3 very ripe medium bananas, peeled: you want them heavily speckled or brown, because that’s where the sweetness comes from
• 1/2 cup (115 g) unsalted butter, melted and cooled slightly: keeps the cake soft without a mixer
• 3/4 cup (150 g) packed light brown sugar: brings a slight molasses depth that white sugar can’t
• 1 large egg, at room temperature: cold egg can seize the melted butter, so leave it out for 15 minutes
• 1 tsp vanilla extract
• 1 1/2 cups (190 g) all-purpose flour: spooned and leveled, not scooped
• 1 tsp baking soda
• 1/2 tsp fine sea salt
• 3/4 cup (130 g) semi-sweet chocolate chips: plus a small handful to scatter on top

Variations / Substitutions

• Swap the chocolate chips: try dark chocolate chunks for bigger melted pockets, or white chocolate chips for a sweeter, creamier bite
• Add nuts: fold in 1/2 cup toasted walnuts or pecans along with the chocolate chips
• Dairy-free: use a good vegan butter stick and skip the egg, adding 1/4 cup more mashed banana; the texture will be a bit denser but still soft
• Whole wheat: swap up to half the all-purpose flour with whole wheat; the cake will be slightly nuttier and a little more hearty

If you love this one, you might also try a simple cinnamon swirl banana bread next.

How to Make Banana Chocolate Chip Cake

Step 1: Mash the Bananas

Heat the oven to 350°F (175°C) and line a 9×5-inch loaf pan with parchment, leaving a little overhang on the long sides. In a large bowl, mash the 3 bananas with a fork until they look smooth with a few small lumps. Scrape down the sides so no solid chunks hide at the bottom.

The bananas should feel like a thick purée, not like banana slices. A few tiny lumps are fine, they’ll melt into the cake as it bakes.

Step 2: Whisk the Wet Ingredients

Pour the 1/2 cup melted butter and 3/4 cup brown sugar into the bowl with the bananas. Whisk by hand until you can’t see any separate streaks of butter, about 20 seconds. Crack in the egg and add the 1 tsp vanilla, then whisk again until smooth. The mixture will look glossy and a bit looser than before.

Switching to a whisk now helps break up the brown sugar so it dissolves a little, which stops any gritty spots in the finished cake.

Step 3: Fold in the Dry Ingredients

Sprinkle the 1 1/2 cups flour, 1 tsp baking soda, and 1/2 tsp salt evenly over the wet mixture. Switch to a rubber spatula and fold just until you can’t see dry flour anymore. Stop the moment the last streak disappears. Overmixing here makes the cake tough, so a few gentle passes are all you need.

The batter will look thick and a little shaggy at first, then come together into a soft, glossy dough. If you see a pocket of flour near the bottom, fold it under one more time and stop.

Step 4: Scatter the Chocolate Chips

Add the 3/4 cup chocolate chips and fold them through with the spatula, about 4 or 5 strokes. Scrape the batter into the prepared pan and smooth the top with the back of the spatula. Sprinkle a small handful of extra chips over the surface and press them in lightly so they stick.

The top won’t be perfectly flat, and that’s fine. A slightly uneven surface gives you those craggy, golden edges once baked.

Step 5: Bake the Cake

Slide the pan onto the middle rack and bake for 50 to 55 minutes, until a toothpick pushed into the center comes out with a few moist crumbs, not wet batter. If you poke a chocolate chip, the toothpick may look gooey, so try a spot without a chip. Rotate the pan halfway through if your oven bakes unevenly.

Around the 40-minute mark, the kitchen will smell like toasted butter and banana. If the top browns too fast, lay a piece of foil over it loosely and let it finish baking.

Step 6: Cool and Slice

Lift the cake out of the pan using the parchment overhang and set it on a wire rack. Let it cool for at least 20 minutes before slicing. Cutting it while hot will let steam escape, and the inside can turn gummy. Once it’s cooled to warm, slice with a serrated knife and serve. The chocolate chips will still be a little soft in the middle.

The crust should be deep golden and slightly crisp, and the first slice will give you that tender, almost creamy crumb studded with dark chocolate.

Tips for the Best Banana Cake

• Banana spotting: the more brown spots, the better. Fully black bananas are even sweeter, but if they’re straight-up slimy or have mold, pass
• Don’t break the crust: letting the cake cool completely uncovered on the rack prevents the top from getting soggy, so resist covering it with a towel
• Toasty chocolate chips: for an extra layer, scatter a few chocolate chips on top 5 minutes before the bake ends, then let them melt and set into a thin crackly cap
• Quick muffin version: divide the batter into a lined 12-cup muffin tin and bake 18 to 20 minutes at the same temperature

Bake times by pan:

Storing Leftover Cake

• Refrigerate: wrap the cooled cake tightly in plastic or store in an airtight container for up to 5 days. The cooler temperature keeps the chocolate chips firm, which some people prefer
• Reheating: warm individual slices in the microwave for 15 to 20 seconds, just until the chocolate softens again
• Serve cold: this cake is actually lovely straight from the fridge, especially on a warm day, because the crumb stays dense and almost fudgy

Frequently Asked Questions

Can I use frozen bananas?

Yes, thaw them first and drain off any excess liquid before mashing, otherwise the extra moisture will make the cake gummy. Then use them exactly as you would fresh.

Why didn’t my cake rise?

Baking soda starts working the moment it hits the banana’s acidity, so if the batter sat on the counter for more than 10 minutes before going into the oven, it can lose its lift. Mix and get it baking quickly.

Can I swap the butter for oil?

Sure, use 1/2 cup neutral oil instead of melted butter. The cake will be a little wetter and the top won’t get as crisp, but it stays soft for days.

Banana Chocolate Chip Cake Recipe

Print Recipe Pin Recipe

Prep Time 10 minutes mins

Cook Time 50 minutes mins

Total Time 1 hour hr

Servings: 8 servings

Calories: 370

Ingredients Method Notes

Ingredients

  

• 3 very ripe medium bananas, peeled
• 1/2 cup (115 g) unsalted butter, melted and cooled slightly
• 3/4 cup (150 g) packed light brown sugar
• 1 large egg, at room temperature
• 1 tsp vanilla extract
• 1 1/2 cups (190 g) all-purpose flour
• 1 tsp baking soda
• 1/2 tsp fine sea salt
• 3/4 cup (130 g) semi-sweet chocolate chips, plus a small handful for topping

Method

 

1. Heat oven to 350°F (175°C). Line a 9×5-inch loaf pan with parchment. Mash bananas in a large bowl.
2. Whisk in melted butter, brown sugar, egg, and vanilla until smooth.
3. Fold in flour, baking soda, and salt with a spatula just until no dry spots remain.
4. Fold in chocolate chips, reserving a few for the top. Scrape batter into pan and smooth the surface, then scatter reserved chips on top.
5. Bake 50 to 55 minutes until a toothpick inserted in the center comes out with moist crumbs. Cool in the pan 10 minutes, then lift out onto a rack.
6. Cool at least 20 minutes before slicing with a serrated knife. Slice and serve warm or at room temperature.

Notes

If the bananas are on the small side, use 4 instead of 3 to get a full 1 1/2 cups mashed. The cake slices most cleanly when it’s completely cool, but the first warm slice right after the 20-minute rest is hard to resist.