Chocolate Peanut Butter Mug Cake

Prepare the batter: In a large microwave-safe mug or large ramekin, combine the dry ingredients (protein powder, oat flour, baking powder, and powdered peanut butter) with the wet ingredients (egg or flax egg, milk, and vanilla extract), whisking vigorously until no clumps remain. The batter should be the texture of cake batter. Add in half of the chocolate chips, stirring to fully incorporate them into the batter.

Cook the mug cake: Place the coffee mug or ramekin into the microwave. Microwave for 50 seconds, then stir and check the texture. Depending on the power of your microwave, you may need to cook an additional 10-20 seconds, but do this in 5-10 second intervals to avoid the mug cake taking on a rubbery texture. Once cooked, top with the remaining half of the chocolate chips.