Mix the cake mix according to the package instructions.
Preheat the air fryer to 320 degrees.
Fill each pan with 1 cup of the batter or about ⅔ full. Bake for 18-22 minutes.
In a stand mixer, add the butter, sugar, vanilla extract, and two tablespoons of milk and mix to combine. The frosting should be thick and spreadable.
Measure out ¾ cup of the frosting and put it in a medium bowl. Add 45 drops or ⅜ teaspoon of red food coloring to the medium bowl and 63 drops or 4/8 teaspoon + 3 drops of yellow food coloring.
Take another ½ cup of frosting and put it in a smaller bowl. To the small bowl add 16 drops or ⅛ teaspoon + 1 drop of yellow food coloring and 4 drops of red food coloring. Scrape the sides of the bowl.
Using a serrated knife, cut the top off until the surface of the cake is leveled.
Start by putting a small amount of frosting on your cake board or rotating cake stand.
Next, place your first cake layer on the cake cardboard or cake stand. Then spread frosting on top. Repeat for all layers.
Use an offset spatula to apply a thin layer of white frosting all over the cake. It should be thin enough to see the cake through it. Smooth the sides and top of the cake using a cake scraper. Turn the cake stand as you go while removing any excess frosting. Freeze the cake for 10 minutes to set the icing.
Use an offset spatula apply the dark orange frosting around the bottom of the cake about ⅓ of the way up. Wipe off the spatula and continue spreading the remaining colors. Using the scraper, smooth the sides while turning the cake stand. Wipe your scraper after each time you go around the cake. To smooth the top you want to gently drag the scraper from the edges towards the center while turning the cake stand. Continue until the top is smooth and leveled. Enjoy!