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Banana Sour Cream Cake

5 from 1 vote
Course Dessert


  • 1 pkg yellow cake mix
  • 3 eggs
  • 1 cup mashed banana about 3
  • 1 cup sour cream
  • ¼ cup oil
  • 8 oz cream cheese softened
  • ½ cup butter softened
  • 16 oz powdered sugar about 4 cups
  • 1 cup walnut pieces finely chopped


  • Heat oven to 350.
  • Beat cake mix, eggs, bananas, sour cream, and oil with mixer on low until moistened, scraping bottom of the bowl often. Beat on medium 2 minutes.
  • Pour into greased and floured 13x9-inch pan. Bake 35 minutes or until toothpick inserted in center comes out clean. Cool cake completely in pan on wire rack.
  • Beat cream cheese and butter with mixer on medium until blended. Gradually add sugar, beating well after each addition.
  • Remove cake from pan. Carefully cut cake crosswise in half using serrated knife.
  • Place one cake half, top-side down, on platter; spread with frosting. Top with remaining cake half, top-side up. Frost top and sides.
  • Press nuts onto sides and sprinkle over top.
  • Refrigerate leftovers.
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