If you’ve got bananas browning on the counter, this is exactly what you should make. This brown butter banana snack cake is soft, sweet, and incredibly moist, with a rich flavor that makes it feel like more than just your average banana recipe.
It’s the kind of cake you slice into squares, dust with powdered sugar, and grab every time you walk through the kitchen. No frosting, no layering, just a simple, nostalgic cake that somehow disappears way too fast.
Why You’ll Love This Recipe
- Super moist, tender crumb (thanks to bananas + sour cream + oil)
- Brown butter adds a rich, slightly caramelized flavor
- Sweet enough to stand on its own—no frosting needed
- Easy, one-bowl style recipe
- Perfect way to use overripe bananas
Recipe Tips
Brown the butter properly Take your time here, this is where the magic happens. You want golden brown bits and a nutty aroma, not burnt butter. A light-colored saucepan helps you see when it’s ready.
Don’t over mix the batter Once you add the flour, mix just until combined. Overmixing can make the cake dense instead of soft.
Use the right pan A metal 9×9 baking pan works best for even baking.
Line with parchment for easy removal Lining your pan with parchment paper makes it easier to lift the cake out cleanly and slice neat squares.
Let it cool before dusting If the cake is warm, the powdered sugar will melt right in. For that classic look, wait until it’s completely cool, then dust generously.
How to Brown Butter
Browning butter is simple and adds incredible flavor to this cake. In a light-colored saucepan (this helps you see the color change), melt the butter over medium heat, stirring frequently. It will foam, then start to develop golden brown bits on the bottom and smell rich and nutty, this usually takes about 4–5 minutes. Once you see those golden bits, remove it from the heat right away to prevent burning. Let it cool slightly before adding it to your batter.
How to Pick the Right Bananas
The best bananas for this recipe are very ripe, think lots of brown spots, even mostly brown skins. They should be soft and mash easily with a fork.
Ripe bananas are:
- Sweeter
- More flavorful
- Better for moisture
If your bananas aren’t quite there yet, you can speed things up by baking them (peels on) at 300°F for about 15–20 minutes until softened.
Storage
Store the cake in an airtight container at room temperature for up to 3 days. It stays incredibly soft and moist, so no need to refrigerate. If you want to keep it longer, you can refrigerate it for up to 5 days, just let it come to room temp before serving for the best texture. You can also freeze slices individually for up to 2 months. Just thaw and dust with a little fresh powdered sugar before serving.
This is one of those recipes that hits that perfect middle ground, it’s richer and softer than banana bread, but simpler and lighter than a frosted cake. The brown butter gives it a little something extra, but it still feels like the kind of snack cake you grew up with. Make it once, and it’ll probably become your go-to every time you’ve got bananas going bad.
Brown Butter Banana Snack Cake
Ingredients
- ½ cup salted butter
- ¾ cup light brown sugar
- ¼ cup granulater sugar
- 3 very ripe bananas about 1 ½ cups mashed with a fork
- 1 egg room temperature
- 1 ½ tsp vanilla extract
- 2 tbsp vegetable oil
- ¼ cup sour cream room temperature
- 1 ¾ cup all-purpose flour
- 1 tsp baking soda
- ½ tsp baking powder
- ¾ tsp ground cinnamon
- ½ tsp kosher salt
- powdered sugar for dusting
Instructions
- Preheat oven to 350°F. Grease or line a 9×9 baking pan. In a saucepan over medium heat, melt butter and continue cooking until golden brown and nutty (about 4–5 minutes). Let cool slightly.
- In a large bowl, whisk together mashed bananas, brown sugar, granulated sugar, egg, vanilla, oil, sour cream, and browned butter until smooth.
- Stir in flour, baking soda, baking powder, salt, and cinnamon. Mix just until combined. Pour batter into prepared pan and smooth the top. Bake for 30–38 minutes, or until the center is set and a toothpick comes out with a few moist crumbs. Let cool completely, then dust generously with powdered sugar before slicing.