Mash bananas set aside
Combine cake mix, sugar, oil, sour cream,eggs,vanilla and mashed bananas and beat on low speed for 30 seconds, until combined.
Beat at medium speed for 1 1/2 to 2 minutes
Gently fold in chocolate chips an nuts
Pour into 2 greased and flour 9 inch cake pans
Bake at 350(F) degrees for 33-38 minutes or use toothpick to test
Cool and frost. Use frosting you like.
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