Preheat the Oven and Prepare the Pan - Preheat the oven to 350 degrees Fahrenheit. Next grease the pan with cooking spray or shortening and then sprinkle with flour until fully covered. Pour out the excess flour and set the pan aside.
Beat the Ingredients - In a large bowl, beat the cake mix, eggs, oil, sour cream, and mashed bananas with an electric mixer until combined. Frequently stop to scrape the sides of the bowl. Beat the mix on medium speed for two minutes.
Bake the Cake - Pour the cake mix into the pan using a spatula. Make sure that the cake mix is evenly spread. Bake the cake for 35 minutes.
Decorate the Cake - Allow the cake to cool completely. Carefully remove from pan and cover with cream cheese frosting. Top with chopped walnuts if desired.
Slice the cake into 16 pieces and keep the frosted cake chilled. Cake frosted with cream cheese frosting needs to be refrigerated in order to keep it safe for eating.
Packed with flavor and texture, this banana cake will not disappoint. Best of all, enjoy it with cream cheese frosting and walnuts. Banana lovers will rejoice when they try a slice of this cake.
Using cake mix provides for an easy and tasty cake. Yellowcake mix is the best option to create a traditional banana cake. Ideally, you will want to use a yellow cake mix that contains a pudding mix within it.