Banana Cake with Buttercream Frosting is what happens when overripe bananas meet classic celebration cake. It has the nostalgic aroma of banana bread, but the texture is lighter, fluffier, and built for layers of creamy frosting. Instead of being dense and loaf-like, this cake bakes up soft and tender, with a delicate crumb that soaks in the natural sweetness of the fruit. Paired with smooth, vanilla-rich buttercream, it turns a humble bunch of bananas into a centerpiece dessert.
This cake is ideal for birthdays, potlucks, or any day when you want something comforting but a little special. The bananas add moisture and flavor without making the cake heavy, and the buttercream brings balance with its airy sweetness.
Why this cake works
Ripe bananas act as both sweetener and tenderizer. Their natural sugars caramelize slightly in the oven, while their moisture keeps the cake soft for days. A touch of buttermilk adds gentle tang and helps the crumb stay delicate. The buttercream, whipped until pale and fluffy, provides a creamy contrast to the fruity cake.
Ingredients
For the banana cake
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3 very ripe bananas, mashed smooth
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2 cups all-purpose flour
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1½ teaspoons baking powder
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½ teaspoon baking soda
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½ teaspoon salt
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½ cup unsalted butter, softened
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1 cup granulated sugar
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2 large eggs, room temperature
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1 teaspoon vanilla extract
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¾ cup buttermilk
For the buttercream frosting
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1 cup unsalted butter, softened
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3½ to 4 cups powdered sugar
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2–3 tablespoons heavy cream or milk
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1 teaspoon vanilla extract
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Pinch of salt
