3 basic chocolate mousse Recipes

basic white cake for 3, 10 inch layers, flour, baking powder, butter or margarine at room temperature, sugar, vanilla, milk, egg whites ( save yolks for something else, no yolks are used in this, glaze, sugar, orange liquor, strawberry mousse, strawberries, mousse , save 2 cups for cake and decoration ), powder sugar, pkt unflavored gelatin ( 2 1/4 tsp ), lemon juice, heavy cream, egg whites, fluffy cream cheese frosting, cream cheese, heavy cream, enough powder sugar to taste, extra strawberries, chocolate covered strawberries ( optional )