Ingredients

• 2 cups packed brown sugar
• 1.5 cups butter , softened and divided
• 4 large eggs
• 4 bananas , mashed
• 1.25 cups sour cream , divided
• 4 cups sifted cake flour
• 1 teaspoon baking soda
• 0.13 teaspoons salt
• 1 cup chopped walnuts
• 3 teaspoons vanilla extract , divided
• 4 cups confectioners' sugar

Instructions

1. 1 Preheat the oven to 350 degrees F (175 degrees C). Grease three (9-inch) round cake pans.
2. 2 Beat together brown sugar and 1 cup butter in a large bowl until creamy and smooth. Add eggs one at a time, mixing well after each addition. Beat in mashed bananas and 1 cup sour cream. Stir in flour, baking soda, and salt until well combined. Mix in nuts and 2 teaspoons vanilla until incorporated.
3. 3 Bake in the preheated oven until a toothpick inserted into the centers of cakes comes out clean, 30 to 40 minutes. Allow cakes layers to cool completely on wired racks.
4. 4 Meanwhile, beat confectioners' sugar, remaining 1/2 cup butter, and remaining 1/4 cup sour cream in a large bowl until well combined. Add remaining 1 teaspoon vanilla and beat until frosting is fluffy.
5. 5 Layer cooled cake layers with frosting.

Nutrition per serving