Step 1

Preheat oven to 350 degrees. Generously grease and flour a 9 or 10 cup bundt pan.

Step 2

In a medium bowl, whisk together flour, baking powder and salt.

Step 3

With an electric mixer, beat the butter and sugars until light and fluffy. Add the eggs, one at a time, beating well after each addition. Mix in vanilla.

Step 4

Add the flour mixture, alternating with the buttermilk, beginning and ending with the flour. Mix in the mashed banana.

Step 5

Pour the batter into the prepared pan and bake for 45-50 minutes, or until a toothpick or tester comes out clean. Move to a wire rack to cool for 10 minutes before inverting on a wire rack to cool completely.

Step 6

Meanwhile, make the frosting by beating the cream cheese and butter until smooth. Gradually add the powdered sugar. Stir in vanilla. Spread or pipe frosting over cooled cake.