Chocolate Mayonnaise Cake is the best chocolate cake ever. The secret ingredient is mayonnaise.
Whisk the dry ingredients.
Beat the mayonnaise, vanilla extract and boiling water together.
Whisk until combined and smooth.
Pour the wet ingredients into the dry ingredients.
Pour the cake batter into a greased sheet pan.
Bake at 350 F in a preheated oven for 25 - 30 minutes.
Enjoy the best ever Chocolate Mayonnaise Cake.