Homemade Little Debbie Christmas Tree Cakes

Name: Homemade Little Debbie Christmas Tree Cakes
Cook time: 2 h 50 min
Total time: 2 h 50 min
Cuisine: American
Ingredients: 10 large eggs, separated; 1.5 cups granulated sugar, divided; 2 tsp. vanilla; .5 tsp. cream of tartar; 1.5 cups cake flour; 1 tsp. baking powder; .5 tsp. kosher salt; Swiss Meringue Buttercream; 24 oz. vanilla melting wafers, such as CandiQuick; Green sanding sprinkles; Red cookie decorating icing