Step 1

Preheat oven to 350F and grease a 9×13″ baking dish.

Step 2

In a medium bowl, toss together the flour, baking soda, and salt. Set aside.

Step 3

Using a stand mixer with paddle attachment or electric mixer, cream together the sugar and butter until combined. Mix in the sour cream, then eggs, one at a time, mixing in between.

Step 4

Mix in the mashed bananas and vanilla extract. Then slowly stir in the flour mixture until just combined. Spoon the batter into the prepared baking pan.

Step 5

Bake for 35-40 minutes or until the center comes out clean. Let cool completely before frosting.

Step 6

Using a stand mixer with paddle attachment or electric mixer, beat the butter and cream cheese until combined.

Step 7

Mix in the powdered sugar one cup at a time, scraping the bottom of the bowl occasionally. Then mix in the vanilla and salt until smooth.

Step 8

Spread on cake, and top with chopped walnuts, chocolate shavings or banana slices (just before serving) if desired.