Banana Coffee Cake with Peanut Butter Icing

A Cozy Twist on Classic Comfort Baking

There’s something undeniably comforting about the aroma of banana bread wafting through the kitchen—ripe bananas caramelizing in the oven, brown sugar bubbling, cinnamon spicing the air. But when you take that classic banana bread and turn it into a tender, crumbly coffee cake, then crown it with a dreamy layer of peanut butter icing, well… you’ve got something that tastes like childhood memories wrapped in a warm hug.

This banana coffee cake with peanut butter icing is a celebration of simplicity and indulgence. The bananas give it a naturally sweet, moist base, while the streusel topping adds just the right amount of crunch. And the icing? Oh, the icing. It’s creamy, slightly salty, and melts into the warm cake like frosting on your favorite morning muffin.

This recipe came into my life on a rainy Saturday when I had overripe bananas on the counter and an afternoon to bake something cozy. I combined my love of peanut butter and bananas—and it instantly became a family favorite. Whether you serve it at brunch, for a weekend treat, or as a late-night dessert, it’s one of those baked goods that’s just impossible to resist.

Why You’ll Love This Recipe:

• Perfectly moist and full of banana flavor
• Buttery cinnamon streusel for irresistible texture
• Rich peanut butter icing that melts right into the cake
• A comforting treat for breakfast, brunch, or dessert
• Easy to make with pantry ingredients

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Ingredients You’ll Need:

For the Cake:

• 1 ½ cups mashed ripe bananas (about 3 bananas)
• 2 cups all-purpose flour
• 1 teaspoon baking soda
• 1 teaspoon baking powder
• ½ teaspoon salt
• ½ teaspoon ground cinnamon
• ½ cup unsalted butter, softened
• ¾ cup brown sugar
• 2 large eggs
• 1 teaspoon vanilla extract
• ½ cup sour cream or plain Greek yogurt

For the Streusel Topping:

• ½ cup brown sugar
• ¼ cup all-purpose flour
• ½ teaspoon ground cinnamon
• 3 tablespoons cold unsalted butter, cubed

For the Peanut Butter Icing:

• ½ cup creamy peanut butter
• 1 cup powdered sugar
• 2–3 tablespoons milk (as needed for consistency)
• ½ teaspoon vanilla extract

How to Make Banana Coffee Cake with Peanut Butter Icing:

Step-by-Step Instructions:

Step 1: Preheat and Prep
Preheat your oven to 350°F (175°C). Grease a 9×9-inch square baking pan or line it with parchment paper for easy removal.

Step 2: Make the Cake Batter
In a medium bowl, whisk together the flour, baking soda, baking powder, salt, and cinnamon. Set aside.

In a large bowl, cream the butter and brown sugar until light and fluffy. Add eggs one at a time, beating well after each addition. Stir in the vanilla, mashed bananas, and sour cream until combined.

Gradually add the dry ingredients to the wet mixture, mixing just until no flour streaks remain. Don’t overmix—just enough to bring everything together.

Step 3: Prepare the Streusel Topping
In a small bowl, mix the brown sugar, flour, and cinnamon. Cut in the cold butter using a fork or pastry cutter until the mixture resembles coarse crumbs.

Step 4: Assemble and Bake
Pour the cake batter into the prepared baking pan and spread evenly. Sprinkle the streusel topping generously over the batter.

Bake for 35–40 minutes, or until a toothpick inserted in the center comes out clean. Let the cake cool slightly in the pan while you prepare the icing.

Step 5: Make the Peanut Butter Icing
In a medium bowl, whisk together the peanut butter, powdered sugar, vanilla extract, and 2 tablespoons of milk. Add more milk if needed to reach a smooth, pourable consistency.

Step 6: Ice the Warm Cake
Drizzle the peanut butter icing over the warm (but not hot) cake. Let it set for a few minutes, then slice and serve.

Helpful Tips:

• Use very ripe bananas for the best natural sweetness and flavor.
• If your icing thickens too much, warm it slightly in the microwave for a few seconds to loosen it up.
• Add chopped peanuts or chocolate chips to the streusel for extra texture.
• To make it ahead, bake the cake and add the icing just before serving for the freshest presentation.

Details:

• Prep Time: 20 minutes
• Cook Time: 40 minutes
• Total Time: 1 hour
• Yield: 9–12 servings
• Category: Breakfast, Dessert
• Method: Baked
• Cuisine: American
• Diet: Vegetarian

Notes:

This banana coffee cake is also delicious without the icing—perfect with a simple dusting of powdered sugar or a swipe of butter. But that peanut butter glaze truly takes it to another level. If you’re a peanut butter lover, it might just become your new favorite way to use up ripe bananas.

Nutritional Information (Per Serving – Approximate):

• Calories: 340
• Protein: 6g
• Fat: 18g
• Carbohydrates: 40g
• Sugar: 23g
• Fiber: 2g
• Sodium: 210mg

Frequently Asked Questions:

Can I make this with whole wheat flour?
Yes, you can substitute up to half the all-purpose flour with whole wheat flour. Just note the texture may be slightly denser.

Can I freeze the cake?
Absolutely. Let it cool completely, then wrap tightly and freeze for up to 2 months. Freeze without icing for best results and add the icing after thawing.

Can I make this dairy-free?
Yes—use a dairy-free butter alternative and swap sour cream with a dairy-free yogurt.

Storage Instructions:

Store the cake covered at room temperature for up to 2 days or refrigerate for up to 5 days. For the best texture, let it come to room temperature before serving. You can also microwave individual slices for about 10 seconds to soften.

Related Recipes:

If you liked this recipe, you’ll definitely enjoy these other cozy bakes:

• Pumpkin Chocolate Chip Protein Bars
• Cinnamon Swirl Bundt Cake
• Roasted Chocolate Cherry Brownies

Conclusion:

If you’re looking for the perfect way to use up those ripe bananas—or just need something that feels like a warm embrace on a plate—this banana coffee cake with peanut butter icing is your answer. It’s soft, flavorful, just sweet enough, and made even better by that drizzle of rich peanut butter icing. One slice and you’ll understand why this is no ordinary coffee cake.