Devil'S Food Cake - cooking recipe

Ingredients

1/2 c. butter
1 c. white sugar
2 egg yolks
2 c. cake flour
1 tsp. baking soda
1 c. sour milk*
1/2 tsp. vanilla
2 1/2 sq. Baker's chocolate

Preparation

*One teaspoon vinegar or lemon juice will sour 1 cup whole milk.