• Heat the oven to 350°F. Take two round pans of 9-inches each. Grease the pans well with oil or butter. • Take a large bowl and add cake mix, water, eggs, and mayonnaise in it. Slowly mix the ingredients for 30 seconds. Now increase the speed to high and mix for 4 minutes. • Pour an equal amount of cake batter in both pans. • Place these pans in the preheated baking oven and bake the cakes for 30 - 32 minutes. After 32 minutes pierce a toothpick in the middle of the cakes. If the toothpick comes out clean, your cakes are ready. • Rest the cakes for 5 minutes. Now remove cakes from the pans. Place them on the cooling racks and let them cool for about an hour. • Place one cake on a plate and spread 3/4th of the frosting on top. Now place the other cake on top of it and pour the remaining 1/4th part of the frosting on top of it. Now use your skills to decorate the cake and Serve!