In a small mixing bowl, combine flour, cocoa, baking powder, baking soda and salt. Mix well with a fork until fully combined. Set aside.
In a separate mixing bowl, whisk together the egg, buttermilk, vanilla and oil.
Add in the sugars and mix until well combined.
Fold in the dry ingredients and mix until fully combined.
Add the hot water and mix until smooth.
Spray a 6-inch spring form pan with non-stick cooking spray. Place the pan in the bottom of the air fryer (be sure to measure first to ensure it fits).
Pour cake batter into the bottom of the pan. It should self-level well. Be sure to scrape the edges of the bowl using a rubber spatula to gather any excess batter.
Cover the springform pan with tin foil and bake at 320 degrees for 35 minutes.
When done, uncover the cake and continue to bake for 5-8 minutes.
When done, carefully remove the springform pan from the air fryer using oven mitts. Allow it to cool for about 10 minutes before opening the pan and transferring the cake to a wire rack. Allow the cake to continue to cool there completely before adding frosting to the top and sides of the cake. Top with rainbow sprinkles immediately following frosting.
Notes:
This recipe does call for store bought chocolate cake frosting. However you can create your own.
Be sure to measure your springform pan beforehand.
40-minutes seems to be the perfect baking time for this cake.