Ingredients
- 2 cups all-purpose flour
- ½ teaspoon baking powder
- ½ teaspoon baking soda
- ½ teaspoon salt
- ½ cup mashed banana (from 1 large ripe banana)
- ½ cup sour cream
- 4 ounces (1 stick) unsalted butter, softened
- ½ cup granulated sugar
- ½ cup packed light-brown sugar
- 1 large egg
- 1 teaspoon pure vanilla extract
- 16 ounces cream cheese, softened
- 1 cup confectioners' sugar, plus more for dusting
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