1 pkg (box) yellow cake mix
2 medium ripe bananas, mashed (about 1 cup)
3 (2.1 oz ea) Nestle Butterfinger Candy bar, chopped, divided
1 container (16 oz) prepared white frosting

Preheat oven to 350°F. Grease and flour a 13 x 9 inch baking pan. Prepare cake mix batter according to package directions; stir in bananas and 3/4 cup chopped Butterfinger. Pour into prepared pan.

Bake for 40 to 50 minutes or until wooden pick inserted in center comes out clean. Cool completely in pan on wire rack. Frost cake with white frosting and sprinkle with remaining chopped butterfinger.