Aunt Shirley'S Chocolate Cake
["1/2 c. shortening", "1 c. sugar", "1 c. brown sugar", "2 beaten eggs", "2 squares Baker's chocolate*", "1 c. sour milk**", "1 tsp. vanilla", "2 1/2 c. flour", "1/2 tsp. salt", "2 tsp. baking soda", "1 c. hot water"]
["*1 square of chocolate is equal to 3 Tbsp. cocoa baking powder plus 1 Tbsp. shortening."]
["shortening", "sugar", "brown sugar", "eggs", "sour milk", "vanilla", "flour", "salt", "baking soda", "water"]