“The One” Chocolate Mug Cake

There comes a time in every girl’s life when she needs a chocolate mug cake.

Perhaps it’s one of those days where you just want to curl up on the couch all day and watch bad Lifetime movies about stolen babies (ladies, you know what I’m talking about).

Or maybe you just ran four miles for the first time in your entire life and unless you counteract it immediately with a dessert, the universe will be thrown out of balance and implode, and the entire 2012 apocalypse will be all your fault.

Or maybe it’s your birthday and everyone forgot so there was no cake. Okay, sorry, that last one was kind of depressing. Anyway, my point is, sometimes you just need a bite of cake to make things right. Just a bite.

A close up spoonful of chocolate mug cake with peanut butter

Love peanut butter and chocolate? Check out my No-Bake Pretzel Peanut Butter Bars or Peanut Butter Fluff Cups.

What Makes This Mug Cake “The One”

I was never a fan of mug cakes because all of the versions I’ve tried have turned out rubbery and just not at all delightful. Until I found this recipe, which for me is “the one.” This is why I like it:

  • It’s not very sweet. (If you want it sweeter, add more sugar or some chocolate chips.)
  • It’s small. Other recipes I’ve tried have just been too big and they make me feel like I just over indulged. This one is just a few, rich, delightful bites.
  • There is no egg. I find that eggs make mug cakes rubbery or spongey and they also mean that you can’t scale the recipe in size. If you want a small cake, you can’t just split an egg in half, right?
  • There are a lot of variations. Add chocolate chips, use nutella, jam, or caramel sauce in place of the peanut butter, vegan-ize it by using soy milk in place of cow’s milk… lots of options.

Don’t be tempted to leave out the peanut butter (or jam, or whatever you drop in the center) because it helps keep the cake moist and rich. It simply wouldn’t be the same without it.

Make it a Vegan (Dairy-Free Mug Cake)

With one simple swap, this Chocolate Mug Cake can be made vegan. Simply swap the milk with your favorite non-dairy milk and you’re good to go! Life is good.

So, shout out to Jessie at Made From Scratch for experimenting with mug cakes until finding this perfect mix. You just saved the universe from imploding!

An overhead view of a spoon digging into a chocolate mug cake with peanut butter

In just two minutes you can have this perfect single serving chocolate mug cake to quiet that sweet tooth. BudgetBytes.com
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4.68 from 132 votes

"The One" Chocolate Mug Cake

In just two minutes you can have this perfect single serving chocolate mug cake to quiet that sweet tooth. 
Prep Time: 3 mins
Cook Time: 1 min
Total Time: 4 mins
Servings: 1


  • 2 Tbsp all-purpose flour ($0.02)
  • 1 Tbsp unsweetened cocoa powder ($0.03)
  • 2 tsp sugar ($0.01)
  • 1/4 tsp baking powder ($0.02)
  • a pinch salt ($0.01)
  • 1 Tbsp cooking oil ($0.04)
  • 2 Tbsp milk ($0.04)
  • 1 Tbsp peanut butter ($0.13)


  • In your mug, stir together the dry ingredients (flour, cocoa powder, sugar, baking powder, and a pinch of salt). Make sure there are no clumps.
  • Stir in the vegetable oil and milk until the mixture is smooth. Drop a tablespoon of peanut butter into the center and push it down into the batter.
  • Microwave on high for one minute and then enjoy!


Microwave power varies slightly, so you may want to experiment with the cooking time, give or take 5-10 seconds. One minute is a good place to start.
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Serving: 1 ServingCalories: 344.9 kcalCarbohydrates: 28.4 gProtein: 7.3 gFat: 23.5 gSodium: 569 mgFiber: 1.5 g
Nutritional values are estimates only. See our full nutrition disclaimer here.

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Love microwave mug cakes? Check out my Funfetti Mug Cake, or Cinnamon Nut Swirl Mug Cake!

Close up view of a spoonful of chocolate mug cake with peanut butter

How to Make a Chocolate Mug Cake – Step By Step Photos

Mug Cake Dry Ingredients in the mug
Add 2 Tbsp flour, 1 Tbs unsweetened cocoa powder, 2 tsp sugar, 1/4 tsp baking powder, and a pinch of salt to a microwave safe mug. Stir them together very well.

Add Milk and Oil to mug cake ingredients in the mug
Add 2 Tbsp milk and 1 Tbsp oil, then stir until it forms a batter.

Add Peanut Butter to batter
Drop a dollop of peanut butter (about 1 Tbsp) down into the center of the batter.

Microwaved 60 Seconds
Microwave on high for one minute and you’ve got yourself a cake with a melty, peanut butter center! The cake turns out extra light and fluffy and the peanut butter kind of sinks in as the cake rises up around it. So magical!

Close up side view of a spoonful of chocolate mug cake with melted peanut butter

Every bite has the light cake and a gooey, rich bit of melty peanut butter. Absolutely perfect.

Half eaten chocolate mug cake viewed from above, with the spoon left in the mug.
And then five or six delightful bites later, you’re done and you don’t feel like you do when you “accidentally” eat a whole pint of ice cream. …not that that ever happens. 👀