Red Chocolate Cake

1 cup sugar
2 Tbsp. butter
1 egg yolk
1 cup hot water
1 1/2 cups flour
1 tsp. baking powder
1/4 tsp. salt
1 scant tsp. soda
1/2 cup grated bitter chocolate
2 tsp. vanilla

Cream butter and sugar, add egg. Sift flour, baking powder and salt three times and add alternately with 1/2 cup hot water in which chocolate has been melted. Beat hard for one minute, then add remaining 1/2 cup hot water in which soda has been dissolved. Add vanilla last. Bake in greased and floured pans. (This is a thin mixture - be sure to jolt down hard several times before placing in the oven).