Mom'S Old-Fashioned Burnt Sugar Cake
["2 c. sugar", "1 c. boiling water", "3 c. sifted flour", "3 tsp. baking powder", "1/2 tsp. salt", "1 c. shortening", "4 eggs, separated", "1 tsp. vanilla"]
["Place 1 cup sugar in skillet and heat, stirring constantly, until sugar melts and becomes brown.", "Remove from heat."]
["sugar", "boiling water", "flour", "baking powder", "salt", "shortening", "eggs", "vanilla"]