For the Cake

1. Preheat the oven to 350F degrees. Grease and flour a 9×13 inch pan.
2. In a large bowl sift together the flour, baking powder, baking soda, cinnamon, and salt.
3. In a separate large bowl beat together the butter and sugars until fluffy. Add in the eggs and vanilla and continue beating
4. Turn off the mixer and scrape down the sides of the bowl. Then beat in the mashed bananas followed by the sour cream.
5. With the mixer on low beat in the flour mixture, followed by the buttermilk. Stir in the mini chocolate chips.
6. Pour the batter into the prepared pan and bake for 45-50 minutes or until an inserted toothpick comes out clean.
7. Cool before frosting.

Make the Chocolate Frosting

1. In a large bowl using an electric mixer, beat the butter until fluffy.
2. Sift together the cocoa powder with 3 cups of powdered sugar and the salt, then carefully beat it into the butter.
3. Then beat in the whipping cream 1 tablespoon at a time until you get the desired consistency and sweetness level, adding the rest of the powdered sugar as needed.
4. Frost the cooled cake and serve.