Mug Cake is a fast, fun dessert for one. This Peanut Butter Chocolate Mug Cake recipe is ready in 1 minute with rich flavors you’ll love.

Do you ever find yourself at home after dinner or after work (or school) feeling like you wished you had just a little something sweet?
You don’t have anything that will fill the craving in your kitchen and you don’t want it badly enough to go to the store?
If you are a peanut butter lover I have a solution for you: Peanut Butter Chocolate Mug Cake recipe.
It cooks in 1 minute in the microwave and is flourless (so naturally gluten-free)!
Jump to:
What is a Mug Cake?
As the name suggests, a mug cake is a miniature cake cooked in a coffee mug in the microwave!
It’s a perfect serving for one! It’s fast and easy to make too.

Why Make this Mug Cake recipe?
We must have made this a hundred times and enjoy it every time.
Why make THIS mug cake recipe?
- It’s easy
- Made with ingredients you probably have on hand
- Only four ingredients
- No flour
- Has a wonderful rich peanut butter and chocolate flavor
- Is ready in one minute; perfect for a dessert craving
- It’s a delicious recipe!
Ingredients in this Microwave Mug Cake recipe
Only four simple ingredients are needed to make this rich, delicious little mug cake:
- Peanut Butter
- 1 Egg
- Granulated Sugar
- Chocolate Chips

No Flour Mug Cake
When I first began experimenting to make a successful, good tasting mug cake, most had flour.
My research indicated gluten-free flour mug cakes weren’t usually successful.
This version does not contain flour at all. Perfect for those gluten-free or just avoiding flour!
Chef’s Notes for Making this Mug Cake recipe
I’ve learned some things over the years of making this mug cake that I’ll share:
- Results will vary depending on the mug used; both the mug size and the material.
- The mug in the photos is an 8-ounce (liquid/volume) mug. Each time the cake inflates and settles to a round top over the top of the mug.
- The mug in the video is also an 8-ounce mug but a heavy, thick diner mug. The cake settled a bit below the rim.
- The mug cake can be made in any size mug.
- Different microwaves can impact how much the cake rises.

Cooking the Mug Cake
When the mug cake cooks in the microwave, it will rise up much taller than the mug rim.
You’ll think it’s going to explode but it doesn’t!
The rising peaks as the cooking concludes.
As the mug cake cools it will deflate and settle back into the mug for a denser cake as shown in the photos.
How to Make Peanut Butter Chocolate Mug Cake recipe – Step by Step
- In a small mixing bowl whisk together with a fork: egg, peanut butter and sugar.
- Stir in the chocolate chips.
- Spoon into a microwave safe mug.
- Microwave on high for 1 minute!
- Allow to cool slightly before eating.

More No-Bake Dessert Recipes You’ll Love
- Fluffy No-Bake Strawberry Cheesecake Dessert Lasagna
- {No Bake} Vanilla Bean Pots de Creme with Fresh Cherry Sauce
- 3 Ingredient No Bake Strawberry ‘Tart’
- Angela Pia (Pious Angel): a Light, Boozy Vintage Dessert recipe
- Homemade Peanut Butter Cups
Recipe

Peanut Butter Chocolate Mug Cake recipe
Ingredients
- 1 Egg , whisked to completely blend
- 3 tablespoons Smooth Peanut Butter
- 1 tablespoon plus 1 teaspoon Granulated Sugar
- 1 1/2 tablespoons Dark Chocolate Chips
Instructions
- In a small mixing bowl combine the whisked egg, peanut butter and sugar. Using a fork, mix the ingredients to fully combine.
- Stir in the chocolate chips.
- Spoon the batter into a 8-ounce (volume/liquid) mug or larger.
- Place in the microwave and cook on high for 1 minute. Allow to cool slightly before eating. Note: the mug will be very hot, take care when handling it.
Video
Nutrition
Originally published: August 28, 2016
Courtney O'Dell says
Yummmmmm – so easy and delicious! Maybe dangerous to know I can make this anytime I want!
Tanya Schroeder says
This is so easy and so good, I make this for myself all the time!
Heidy L. McCallum says
This looks wonderful and I love that it’s Gluten-Free! Totally making this tonight.
SHANIKA says
I LOVE Peanut Butter and this mug cake looks so good! YUM!
Meghna says
Hey Toni, it’s one spectacular blog that you have, I visit frequently to find recipes here and this mug cake is just so apt for my crazy busy schedule!
Rachael Yerkes says
Best Mug Cake! I’m such a pb fan!
Patty says
When in a hurry, and it’s often the case, your mug cake recipe is the one I go to, so fast and easy, delicious too!
Noelle says
I love mug cakes and this has been one of my favorites, thank you for sharing!
Kiera says
This is so good! It’s also so easy to make. Will definitely be making this again.
Mary says
This recipe is so easy and delicious.
Brittany says
Made this mink fruit sweetener and sugar free chocolate chips so a low carb snack! Sooo good