I have a coffee cake recipe that I rarely make because it's SO good, I end up eating most of it before anyone else has the chance. That qualifies as "sinful," right? In my recipe file it's called Mom's Coffee Cake, but Sinfully Delicious Coffee Cake sounds more appropriate to this blog, don't you think?
Preheat oven to 350 degrees
1 yellow cake mix
1/4 c butter
1 c brown sugar
1 cup chopped walnuts
1 1/2 c sour cream
For topping: Pour 2/3 of cake mix into large bowl, cut in butter. Mix in brown sugar and walnuts. Set aside.
For batter: In separate bowl, beat eggs with a fork. Stir in sour cream. Blend in rest of cake mix. Pour 1/2 batter into greased & floured 9x13 pan. Sprinkle on 1/2 the topping, then the rest of the batter. End with the topping.
Bake for 40-45 min. Yum, yum, yum.