You know those bananas sitting on your counter right now, turning more black by the hour?
Yeah. Those ones. Don’t throw them away.
Most people automatically reach for banana bread. And look, banana bread is great. But this banana cake? It’s a completely different level.
It’s soft. It’s moist. It’s got a brown butter cream cheese frosting that makes you want to eat it straight off the spatula (and honestly, no one’s judging you if you do 😂).
And here’s the part that surprises most people the first time: the more overripe your bananas are, the better this cake tastes. Those ugly, mushy, blackened bananas? Pure gold in this recipe.
What You’ll Need
For the Cake:
- 3 large overripe bananas (about 1 ½ cups mashed)
- 2 cups all-purpose flour
- 1 ½ tsp baking powder
- ½ tsp baking soda
- ½ tsp salt
- 1 tsp ground cinnamon
- ½ cup unsalted butter, melted and slightly cooled
- ¾ cup granulated sugar
- ¼ cup light brown sugar, packed
- 2 large eggs, room temperature
- 1 tsp pure vanilla extract
- ½ cup sour cream (full fat)
For the Brown Butter Cream Cheese Frosting:
- 4 tbsp unsalted butter
- 8 oz full-fat cream cheese, softened
- 2 cups powdered sugar, sifted
- 1 tsp pure vanilla extract
- 2–3 tbsp heavy cream (to thin, if needed)
- Pinch of salt
Tools You’ll Need
- 9×13 inch baking pan (or two 8-inch round cake pans)
- 2 large mixing bowls
- Hand mixer or stand mixer
- Whisk
- Rubber spatula
- Small saucepan (for browning the butter)
- Measuring cups and spoons
- Offset spatula (for frosting)
- Wire cooling rack
- Fork or potato masher (for mashing bananas)
Pro Tips
These are the things I wish someone had told me the first time I made this cake.
- Brown your butter for the frosting. Technically optional. In reality, it’s the single thing that makes people ask for the recipe. It adds this nutty, almost caramel-like flavor that you can’t get any other way. Take the extra 5 minutes.
- Room temperature eggs matter. Cold eggs can cause the batter to curdle slightly and mess with the texture. Pull them out of the fridge 30 minutes before you start.
- Don’t overmix the batter. Once you add the flour, mix just until combined. Overmixing activates the gluten and gives you a dense, tough cake instead of a soft one.
- Sour cream is non-negotiable. It keeps the cake incredibly moist and adds a slight tang that balances the sweetness perfectly. Greek yogurt works too, but sour cream wins.
- Frost it cold. Let the cake cool completely before frosting — at least 1 hour. Warm cake melts the frosting and it slides right off. Patience here is worth it.
Step-by-Step Instructions
Step 1: Preheat and Prep
Preheat your oven to 350°F (175°C). Grease your 9×13 baking pan and line it with parchment paper, leaving some overhang on the sides so you can lift the cake out easily.
Step 2: Mash the Bananas
Peel your overripe bananas into a bowl and mash them really well with a fork. You want a smooth-ish paste with very few lumps. Set aside.
Step 3: Mix the Dry Ingredients
In a large bowl, whisk together the flour, baking powder, baking soda, salt, and cinnamon. Set aside.
Step 4: Mix the Wet Ingredients
In a separate large bowl, whisk together the melted butter, granulated sugar, and brown sugar until combined.
Add the eggs one at a time, whisking well after each. Add the vanilla extract and mashed bananas. Mix until fully incorporated.
Stir in the sour cream.
Step 5: Combine
Add the dry ingredients to the wet ingredients in two additions, folding gently with a rubber spatula until just combined. A few small streaks of flour are fine.
Step 6: Bake
Pour the batter into your prepared pan and smooth the top. Bake for 28–32 minutes, or until a toothpick inserted into the center comes out clean.
Let the cake cool in the pan for 15 minutes, then lift it out onto a wire rack to cool completely.
Step 7: Make the Brown Butter Frosting
Add the butter to a small saucepan over medium heat. Stir constantly as it melts, foams, and then turns a light amber color with a nutty smell. Watch it closely — it goes from golden to burnt fast. Pour immediately into a heatproof bowl and let it cool to room temperature (about 20 minutes).
Beat the cream cheese until smooth. Add the cooled brown butter and beat again until combined.
Add the powdered sugar gradually, then the vanilla and a pinch of salt. Beat until fluffy. If the frosting is too thick, add heavy cream one tablespoon at a time.
Step 8: Frost and Serve
Spread the frosting over the completely cooled cake. Use the back of an offset spatula to swirl it around. Slice, serve, and try not to eat the whole thing in one sitting. (No promises.)
Substitutions and Variations
| Want to… | Try this… |
|---|---|
| Make it dairy-free | Use vegan butter, dairy-free cream cheese, and coconut cream |
| Use Greek yogurt | Swap 1:1 for sour cream |
| Add chocolate chips | Fold in ¾ cup dark chocolate chips before baking |
| Skip the frosting | Dust with powdered sugar or a simple glaze instead |
| Make it gluten-free | Use a 1:1 gluten-free flour blend |
| Add crunch | Mix in ½ cup chopped walnuts or pecans into the batter |
Make Ahead Tips
This cake is a great one to prep in advance.
- Bake the cake layers up to 2 days ahead. Wrap them tightly in plastic wrap and store at room temperature. Frost the day you plan to serve.
- Make the frosting 3 days ahead. Store in an airtight container in the fridge. Let it soften at room temperature for 30 minutes before using, then re-whip briefly.
- Freeze unfrosted cake. Wrap tightly in plastic wrap then foil and freeze for up to 3 months. Thaw overnight in the fridge before frosting.
Nutrition Snapshot
| Per slice (1/12 of cake) | Approx. amount |
|---|---|
| Calories | ~390 kcal |
| Carbohydrates | ~52g |
| Fat | ~18g |
| Protein | ~5g |
| Sugar | ~34g |
Values are approximate and will vary slightly based on exact ingredients used.
Dietary Notes:
- Lower sugar version: Reduce granulated sugar to ½ cup and use a sugar substitute in the frosting.
- Higher protein: Add 2 tablespoons of unflavored protein powder to the dry ingredients (add 1–2 tbsp extra sour cream to compensate for the dryness).
Leftovers and Storage
- Room temperature: Frosted cake can sit out at room temperature for up to 2 hours during serving.
- Fridge: Store covered in the fridge for up to 5 days. The cake actually gets more moist on day 2, which feels like a reward for having leftovers.
- Freezer: Freeze individual slices on a baking sheet first, then transfer to a zip-lock bag. Keeps for up to 3 months. Thaw at room temperature for 1–2 hours.
FAQ
Can I use frozen bananas? Yes! Thaw them completely first and drain off any excess liquid before mashing. They work great and are often even sweeter.
My frosting is too runny. What happened? The brown butter was probably still warm when you mixed it in. Make sure it’s cooled to room temperature and is slightly solid before using. Pop it in the fridge for 10–15 minutes if needed.
Can I make this as a layer cake? Absolutely. Divide the batter between two 8-inch round pans and bake for 22–26 minutes. Stack with frosting in between and on top.
Do I have to use sour cream? Full-fat plain Greek yogurt is the closest substitute. You can also use buttermilk, though the texture will be slightly different.
How ripe do the bananas really need to be? The blacker, the better. Bananas with mostly black skins are at peak sweetness and have the most moisture, which gives the cake that perfect flavor. Yellow bananas with a few spots? You’ll get a banana cake. Fully black bananas? You’ll get the banana cake.
Can I add a streusel topping instead of frosting? Yes, and it’s delicious. Mix ¼ cup brown sugar, ¼ cup flour, 2 tbsp cold butter, and ½ tsp cinnamon. Crumble it over the batter before baking.
Wrapping Up
Here’s what I know for sure: once you make this banana cake, you will never be able to look at overripe bananas the same way again.
What used to feel like a kitchen problem is now an excuse to bake something that makes your whole house smell incredible.
The recipe is straightforward, the ingredients are pantry staples, and the brown butter frosting is genuinely something special. Make it once and it becomes your go-to.
Go bake it. Then come back and tell me how it went in the comments below. I want to know if you added any mix-ins, how it turned out, and whether you managed to save any for the rest of the family. 😄
AI Image Generator Prompt
Prompt for a 9:16 top-down flat lay image:
Top-down shot on white marble counters with hints of gold, natural soft window lighting, iPhone 15 Pro photography style popular with food bloggers. Show all of the following ingredients and tools neatly arranged: 3 large overripe blackened bananas, 2 cups all-purpose flour in a small bowl, 1 ½ tsp baking powder, ½ tsp baking soda, ½ tsp salt, 1 tsp ground cinnamon, ½ cup unsalted butter (melted in a small glass bowl), ¾ cup granulated sugar, ¼ cup light brown sugar (packed in a small ramekin), 2 large brown eggs, 1 tsp pure vanilla extract in a small bottle, ½ cup sour cream in a small white bowl, 8 oz full-fat cream cheese block, 2 cups powdered sugar sifted into a small bowl, heavy cream in a small glass pitcher, a 9×13 inch baking pan, 2 large glass mixing bowls, a hand mixer, a rubber spatula, a small stainless saucepan, measuring cups and spoons set, an offset spatula, and a wire cooling rack. All items styled naturally with slight visual breathing room between them, warm natural light casting soft shadows, hyperrealistic food photography aesthetic, 9:16 aspect ratio.