Coconut Cream Cake - cooking recipe

Ingredients

1 box cake mix of your choice, cooked
1/4 c. sugar
1 Tbsp. cornstarch
1/4 tsp. salt
1 c. milk
1 egg yolk, slightly beaten
1 Tbsp. butter
1 tsp. vanilla

Preparation

Mix sugar, cornstarch and salt in a saucepan.
Gradually stir in milk.
Bring to a boil over medium heat, stirring constantly. Boil 1 minute.
Remove from heat.
Stir at least 1/2 of mixture into egg yolk.
Blend into remaining mixture.
Boil 1 minute more. Remove from heat; blend in butter and vanilla.
Add coconut to taste.
Cool, stirring occasionally.
Spread between layers and frost with 7 Minute Frosting.