Chocolate Macaroon Cake
["1 egg white (reserve yolk for frosting)", "2 tsp. vanilla", "2 1/4 c. sugar", "2 c. grated coconut (fine)", "1 Tbsp. flour", "1/2 tsp. salt", "1/2 c. cocoa", "3/4 c. hot coffee", "3 eggs, separated", "1 1/2 tsp. salt", "1 tsp. soda", "1/2 c. sour cream", "1/2 c. shortening", "2 c. sifted flour"]
["Coconut Mixture:", "Beat egg white with 1 teaspoon vanilla until soft mounds form.", "Add 1/2 cup sugar gradually, beating until stiff peaks form.", "Stir in coconut, 1 tablespoon flour and half teaspoon salt.", "Set aside."]
["egg", "vanilla", "sugar", "coconut", "flour", "salt", "cocoa", "hot coffee", "eggs", "salt", "soda", "sour cream", "shortening", "flour"]