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Step 1
Preheat your oven to 350 degrees Fahrenheit. Grease (9-inch round cake pans.
Step 2
In a large bowl, add cake mix, eggs, water, and mayonnaise. Mix on low speed for 30 seconds. Increase speed to high and mix for 5 minutes.
Step 3
Pour the batter evenly over the two cake pans.
Step 4
Bake for 30 to 32 minutes. Check for doneness using a toothpick. Insert a toothpick in the middle of the cake - if it comes out clean, it's time to get it out of the oven.
Step 5
Let the cakes rest for 5 minutes, then remove them from the pans. Let them cool on a wiring rack for an hour.
Step 6
Place one cake on a plate and spread frosting on top. Top it with the other cake and coat the top and sides with the rest of the frosting. Decorate the cake as desired. Enjoy!