Banana Cake Recipe With Baking Powder: Moist Layers and Buttery Streusel Crown

This banana cake recipe with baking powder delivers the perfect balance of tender, moist layers and a buttery streusel crown that cracks open at every bite. The secret lies in the baking powder—just 1 teaspoon per cup of flour—which creates that signature lightness while keeping the cake rich and fudgy. I developed this version after years of testing, ensuring the bananas stay tender and the streusel topping stays crispy without overpowering the cake.

What sets this recipe apart is the 30-minute prep time and 350°F bake that guarantees foolproof results every time. The baking powder activates gently, creating air pockets that keep the cake tender, while the streusel adds texture and sweetness. No one will guess it’s made with overripe bananas—this cake is so moist, it stays fresh for days without drying out.

By the time it emerges from the oven, you’ll have a golden dome with a crackly streusel crown and a crumb so tender it melts in your mouth. The bananas add natural sweetness, reducing the need for extra sugar, while the baking powder ensures a lift that’s both delicate and satisfying. Perfect for birthdays, brunch, or just because—this cake is a crowd-pleaser.

The best part? It’s beginner-friendly—no special techniques required. Just mix, bake, and enjoy. For an extra touch, brush the warm cake with a simple glaze or dust it with powdered sugar. Here’s how to make it.

Ingredients for banana cake recipe baking powder

These 13 ingredients create the perfect banana cake with a buttery streusel crown—moist, tender, and foolproof every time.

The bananas are the star here—overripe is best (that’s when they’re sweetest). Grab 3 medium from your counter or fridge, and mash them until smooth. Trader Joe’s always has the sweetest ones, but any grocery store works. The baking powder is non-negotiable—1 teaspoon per cup of flour is the magic ratio for that signature lightness. For the flour, King Arthur or Gold Medal are my go-tos—they bake evenly without gummy spots. And trust me, the light brown sugar makes all the difference in that caramel flavor.

No vanilla extract? Vanilla sugar works in a pinch—just use half the amount. Short on oats? Crushed graham crackers give the streusel a similar texture. The butter for the streusel needs to be cold—that’s what makes it crispy. If you’re in a hurry, microwave the cold butter for 10 seconds to soften just enough for easy mixing. The powdered sugar is optional but worth it—just a light dusting over the warm cake makes it look restaurant-worthy. And if you’re worried about the cake being too sweet, don’t be—the bananas balance everything perfectly.

This cake keeps 3 days at room temperature wrapped in foil, or 5 days in the fridge. For the streusel, make it ahead and store it in the freezer—just sprinkle it straight from frozen onto the cake. The best part? It reheats beautifully—30 seconds in the microwave brings back that warm, gooey texture. And if you’re feeling fancy, brush the warm cake with a simple glaze (powdered sugar + milk) for extra shine. Leftovers? Slice and freeze for quick breakfast treats.

Step-by-step instructions for banana cake with buttery streusel

Here's how to create a perfectly moist banana cake with a crunchy streusel crown—every step matters!

Start by mashing the 3 medium ripe bananas until completely smooth—no lumps! I like to use a fork first, then give it a quick pulse in a food processor. This ensures even distribution in the batter. In a separate bowl, whisk together the 2.5 cups all-purpose flour, 2 tsp baking powder, and 0.5 tsp salt. Sift the flour mixture once to aerate it—this prevents dense cake layers.

Cream the 1 cup unsalted butter and 1.5 cups granulated sugar together until light and fluffy, about 3-4 minutes on medium speed. This step incorporates air, which gives your cake that perfect rise. Add the 2 whole large eggs one at a time, mixing just until combined after each addition. Finally, stir in the 2 tsp vanilla extract and the mashed bananas. The batter should be thick but pourable—if it looks too stiff, add 1-2 tablespoons of milk (though we're not using it here, the bananas should provide enough moisture).

Gradually add the dry ingredients to the butter mixture in three parts, mixing on low speed just until combined after each addition. Overmixing develops gluten, which can make your cake tough. Stop mixing as soon as the flour disappears—you should still see small streaks of batter. The batter will be thick and slightly lumpy, and that's exactly what we want for that classic banana cake texture.

Here's the thing—banana cakes are forgiving, but the key to moisture lies in not overworking the batter. The baking powder will do all the lifting, so let it work its magic. Pour the batter into a 9-inch round cake pan (or two 8-inch pans if you prefer thinner layers) that's been lightly greased and dusted with flour. Tap the pan gently on the counter to release any air bubbles—this prevents sinkholes in the center when baking.

Preheat your oven to 350°F and place the cake pan in the center rack. Bake for 30-35 minutes, or until a toothpick inserted in the center comes out clean with just a few moist crumbs clinging to it. The cake should have a light golden brown color on top, and the edges should pull away slightly from the pan. If your oven runs hot, start checking at the 25-minute mark—every oven is different, so don't rely solely on the timer.

Don't open the oven door during baking—this causes the cake to sink. The bananas contain natural sugars that caramelize beautifully, so resist the urge to peek. When the cake is done, let it cool in the pan for 10 minutes before transferring to a wire rack. This brief rest prevents the cake from collapsing as it cools completely.

While the cake cools, prepare the streusel topping in a separate bowl. Cut the 0.5 cup cold unsalted butter into small cubes and mix with the 1 cup old-fashioned oats, 0.5 cup light brown sugar, and 0.5 cup all-purpose flour using your fingers or a fork until the mixture resembles coarse crumbs with some pea-sized butter pieces remaining. This texture gives you that perfect balance of crunch and creaminess in every bite.

Spread the streusel evenly over the still-warm cake (not hot—just cooled enough to handle). The residual heat from the cake will help the streusel toast slightly, enhancing its flavor. Return the cake to the oven and bake for an additional 8-10 minutes, or until the streusel is golden brown and fragrant. This second bake ensures the streusel gets crispy while the cake underneath stays moist.

Let the cake cool completely on a wire rack before slicing—this is crucial for clean slices and maximum moisture. The cake should be warm to the touch at the center but not hot. Dust the top with 2 tbsp powdered sugar (if using) just before serving for a beautiful finish. The contrast between the moist cake layers and the buttery, crunchy streusel is what makes this recipe truly special.

Slice into 8 equal wedges and serve with a dollop of whipped cream or a scoop of vanilla ice cream. The cake will stay moist for 2-3 days when stored in an airtight container at room temperature, though I doubt it will last that long in your house!

Best sauces and condiments for these flavors

Classic Vanilla Glaze

This simple glaze elevates your banana cake instantly. Mix ½ cup powdered sugar with 2 tablespoons milk (or heavy cream for richness) and ½ teaspoon vanilla extract. Drizzle over the warm cake while it's still on the rack—it'll soak in beautifully. For extra shine, brush with a pastry brush. I like to add a pinch of salt to balance the sweetness. 💫

Cream Cheese Frosting

For a tangy contrast, whip 4 ounces cream cheese at room temperature with ½ cup unsalted butter, 2 cups powdered sugar, and 1 teaspoon vanilla. Spread between layers or on top for a restaurant-quality finish. This frosting pairs perfectly with the banana's natural sweetness. Use a stand mixer for fluffy texture—about 3 minutes on medium speed. 🥄

Lemon Cream Cheese Glaze

Brighten up your cake with this zesty glaze: mix ½ cup powdered sugar, 2 tablespoons lemon juice, and 1 tablespoon lemon zest. Thin with 1-2 teaspoons milk until pourable. The citrus cuts through the richness and complements the bananas beautifully. I like to drizzle it over the streusel for a pop of color and flavor. 🍋

Chocolate Ganache Drizzle

For chocolate lovers, melt ½ cup dark or semi-sweet chocolate chips with ¼ cup heavy cream in a microwave-safe bowl in 30-second intervals, stirring until smooth. Let cool slightly, then drizzle over the cake. The chocolate pairs wonderfully with the caramel notes from the bananas. For extra flair, sprinkle with crushed peppermint or sea salt. 🍫

Maple Whipped Cream

Lighten things up with this easy whipped cream: whip 1 cup heavy cream with 2 tablespoons maple syrup and ½ teaspoon vanilla until soft peaks form. Dollop on top of each slice for a fresh, slightly sweet contrast. The maple adds depth without overpowering the cake. I recommend using Grade B maple syrup for its rich flavor. 🍁

Caramel Sauce

For a decadent touch, heat ½ cup granulated sugar in a saucepan over medium heat until melted and golden brown. Slowly whisk in ¼ cup heavy cream and 2 tablespoons butter until smooth. Drizzle over the cake or serve on the side for dipping. This sauce enhances the banana's natural sweetness and adds a luxurious finish. 🥄

Frequently asked questions