1-1/2 c. cake flour
1 c. sugar
3 tbsp. cocoa
1/2 tsp. salt
1 tsp. baking soda
1 tsp. vanilla
1 tsp. vinegar
5 tbsp. melted butter
1 c. water

Sift together flour, sugar, cocoa, salt and baking soda. Place in an ungreased 8 inch square pan. Make 3 holes in the mixture. In 1 hole put the vanilla, in the second hole, the vinegar, and in the third hole the melted butter. Pour 1 c. water over all and mix well.

Bake at 350°F for 20-25 minutes. Invert pan on wire rack and let stand until cake drops from pan, about 10 minutes. Frost if desired.