Chocolate Cake - cooking recipe

Ingredients

1 c. butter, softened
2 c. sugar
2 eggs
1 tsp. vanilla
2 1/4 c. flour
1/3 c. cocoa
2 tsp. soda
1 c. sour milk *
1 c. boiling water

Preparation

*To sour milk, add 2 tablespoons vinegar.