I love fancy cakes that seem hard but really started with a box cake mix. It is the best deception if you want to seem like you worked really hard but didn't, it's the best!
1 pkg. (2 layer size) yellow cake mix
1 cup mashed ripe bananas (about 3)
1 cup sour cream
1/4 cup oil
1 pkg. (8 oz) cream cheese, softened
1/2 cup (1 stick) butter, softened
1 pkg (16 oz) powdered sugar (about 4 cups)
1 cup walnuts, finely chopped
Heat oven to 350
Beat cake mix, eggs, bananas, sour cream and oil with mixer on low until moistened, scraping bottom of bowl often. Beat on medium 2 minutes.
Pour into greased and flowered 13x9 in pan. Bake 35 min or until toothpick insterted into center comes out clean.
Cool completly in pan on wire rack.
Beat cream cheese and butter with mixer on medium until blended. Gradually add powdered sugar, beating well after each addition.
Remove cake from pan and carefully cut in half.
Place one cake half, top side down on plate; spread with frosting. Top with remaining cake half, top side up. Frost top and sides.
Press nuts onto sides.