Add all of the ingredients except for the chocolate chips to a small blender. I use my Magic Bullet, but a NutriBullet or any blender with a small carafe works. Note: If you’re making mug cakes for two people, double the recipe and use a regular sized blender.
Blend until everything is completely combined and it appears as though all of the oats are well blended. Stir the chocolate chips into the batter.
Pour the batter into a microwave-safe mug. To be safe, use a large mug to avoid any overflow.
If you’d like, sprinkle extra chocolate chips on top of the batter. If you’re adding a tablespoon of butter, drop it into the center of the batter now.
Microwave for 3 minutes, or until the cake is cooked through.
Enjoy the mug cake as is, or drizzle with a little honey or pure maple syrup and add a pat of butter.
