Preheat oven to 350 degrees. Spray two 6 inch cake pans with pan spray.
Mix the flour, sugar, cocoa, baking soda, baking powder, and salt in a bowl.
In a separate bowl add the eggs, whole milk, oil, and vanilla.
Add the bowl containing the eggs, whole milk, oil, and vanilla to the bowl holding the dry ingredients.
Beat for 3 minutes on medium.
Slowly add the boiling water starting with a small amount then pour in the remaining boiling water.
The batter may be a little runny.
Divide the cake batter between two 9 inch cake pans.
Bake at 350 for 30-45 minutes, or until the cake is firm.
Remove from the oven allowing to cool for 10 minutes.
Remove from the pan placing each on a wire rack to cool completely.
While the cake is cooling make your mint buttercream frosting