1 (2 layer size) pkg. yellow cake mix
1 pkg. instant vanilla pudding mix
1 (1 oz.) sq. unsweetened chocolate
1 tbsp. butter
1 c. sifted powdered sugar
1/2 tsp. vanilla
3-4 tsp. water

Prepare cake pans and mix following directions. Cool cake layers. Prepare pudding mix following directions for pudding. Let stand 10 minutes. Lay 1 cake layer on platter, bottom side up. Spread pudding over. Top with second cake, bottom side down. In a pan, stir chocolate and butter over low heat until melted. Remove from heat and stir in sugar and vanilla. Blend enough water into chocolate mixture so it will pour easily. Spread chocolate mixture over top cake layer. Chill.