1 pkg. devils food chocolate cake mix
1 container cherry yogurt
1 egg, slightly beaten
2 tbsp. butter, melted
2/3 c. chopped walnuts
1 (6 oz.) pkg. chocolate pieces

Preheat oven to 350 degrees. Combine cake mix, yogurt, egg, and butter in large bowl. Beat until blended. Stir in walnuts and chocolate pieces.