Flourless Peanut Butter Mug Cake

This mug cake is the perfect solution for when you want just a little something sweet.  Chocolate and peanut butter, gluten-free, and ready in less than 5 minutes, this mug cake could be your new dirty little secret.

Okay, I’ll be the one to say it.  Working at home, kids at home, no getting out for those brief times that are just for you  (like hair, nail appointments, going to the gym) is hard, challenging, and exhausting.  

We’re told that this is a special time to reconnect as a family, slow down, and enjoy these moments.  It’s a beautiful sentiment and I think most of us feel that way to a point.

Microwaveable, flourless, peanut butter mug cake with chocolate chips in and sprinkled on top of the cake.

But, when you spend the whole day caring for your family, being teacher, coach, dance/sports instructor on top of trying to work, keep the house pristine, and worrying about finances, uncertainty, etc., you need to take a moment and nurture YOU – even if it’s just for 10 blissful moments.

That’s where this ridiculously simple and delicious mug cake comes in!  You can literally make this for yourself while the kids are outside for the ten minutes before their attention span shifts to the next activity.  And it’s probably better than drinking at 10 am.  


  • Since this recipe has no flour, it is crucial to the final product that you thoroughly mix the egg into the other ingredients.  You don’t want streaks of scrambled egg. You also want to beat some of the air into the mixture, so that it rises well.
  • You can use granulated sugar, but the brown sugar adds another bit of moisture.  
  • If you use regular chocolate chips, they may not get soft and gooey.  It will still taste amazing, but you won’t get the little pockets of chocolate.
  • By adding water to the top of the cake before microwaving, you will keep the top from becoming overdone and rubbery.  The water will evaporate while cooking but leave a luscious, moist top.

Microwaveable, flourless, peanut butter mug cake with chocolate chips in and sprinkled on top of the cake.


  • You don’t have to use peanut butter.  Try Nutella, cookie butter, or any nut butter.
  • Try adding toffee chips in place of some or all of the chocolate chips.
  • White chocolate chips or even cinnamon chips would work well in this mug cake.
  • Want to cut a bit more calories?  Swerve sweetener works very well in this recipe.
  • Feeling the need to splurge?  While the cake is still hot, unwrap and push a round chocolate, filled truffle candy into the center.  Boom! Molten lava cake for one.

The only equipment this recipe uses, besides a microwave, is:

 So now that we have mom and her sweet tooth taken care of, here are a few suggestions for the rest of the family:



This recipe is for tht moment when you just want a little something sweet.  A mug cake full of peanut butter and chocolate.  Did I mention that it’s gluten free AND ready in less than 5 minutes?  You’re welcomed.

  • Author: Eats By The Beach
  • Prep Time: 3 minutes
  • Cook Time: 1-2 minutes
  • Total Time: 5 minutes
  • Yield: Serves 1
  • Category: Dessert
  • Method: Microwave
  • Cuisine: American



1 large egg, room temperature

3 tablespoons creamy peanut butter

¼ teaspoon baking powder

1 tablespoon +1 teaspoon brown sugar

1 ½ tablespoons mini chocolate chips

1 tablespoon water


In a small bowl, stir together the egg, peanut butter, baking powder, and sugar until fully combined.

Stir in 1 tablespoon of the chocolate chips.

Spray the inside of a large microwave-safe mug with cooking spray.

Spoon the batter into the mug.  Pour the water on top of the batter.

Microwave on high for 1 minute.  Sprinkle the remaining 1 teaspoon chocolate chips over the top of the cake.

Cool slightly before eating.

Keywords: mug cake, dessert recipes, peanut butter recipes, chocolate chip recipes, microwave desserts, quick desserts