1 (2 layer) pkg. yellow cake mix
1 (4 serving) pkg. lemon instant pudding and pie filling
1 c. sour cream
1/3 c. oil
4 eggs

Combine all ingredients in a large mixer bowl. Blend at low speed of electric mixer just to moisten, scraping sides of bowl often. Then beat 4 minutes at medium speed. Pour into two 8x4 inch or 9x5 inch loaf pans which have been lined on bottoms with wax paper. Bake at 350 degrees for 45 minutes or until cakes spring back when lightly pressed. Cool in pans 15 minutes. Remove from pans and finish cooling on racks.