Chocolate Peanut Butter Mug Cake

Prep 5 mins
Cook 1 min
Total 6 mins
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Chocolate Peanut Butter Mug Cake - I found the secret to the best mug cake, no egg!

Hey!! Wait, don’t click away! I swear, unlike all those other mug cakes you have made — this Chocolate Peanut Butter Mug Cake is actually really tasty! It took me a long time to figure out how to get rid of the bad spongy texture of most mug cakes. I loved the flavor – but hated the texture of all the mug cakes I had tried before.

So when my girlfriend Erin posted a recipe for (Banana Nutella Microwave Brownie) that she made up with a leftover half of a banana, I kind of rolled my eyes. I thought, ya right…I have fallen for the mug cake one too many times. But her recipe was so different than any of the others I had tried, I decided to give the mug cake one last chance. And, BAM! It was exactly what I had been looking for!

I started trying to think of what made her recipe so different from all the others…and then it hit me, NO EGG. Sure the banana part is different too, but a banana can be replaced with things like oil and peanut butter. But the egg?! The egg is what had made all the other recipes so spongy! You can make a whole cake with just one egg…so why would we include a whole egg in a tiny mug cake for one??

Chocolate Peanut Butter Mug Cake - I found the secret to the best mug cake, no egg!

Once I realized the egg was what was holding me back, the options were endless. I have made more mug cakes in the past few weeks then I care to admit. Two other super delicious mug cakes I have made are this Red Velvet Mug Cake and this super easy The Best Pumpkin Mug Cake!

This Chocolate Peanut Butter Mug Cake is not too peanut butter-y, but just enough. It’s full of chocolate flavor and has a great texture. When microwaving, it does rise really high and fall. It’s strange and looks  awful, but it tastes absolutely perfect — I promise!

P.S. A mini whisk does make mug cakes easier to make. I tend to make a mess with a fork. ;-)

Update: Lots of questions about where these mugs came from! Aren’t they adorable?? I found them on Amazon. They actually don’t sell this print anymore, but I found these similar ones!

Yield: 1 mug cake

Chocolate Peanut Butter Mug Cake

Chocolate Peanut Butter Mug Cake in a white and blue polka dotted mug

This Chocolate Peanut Butter Mug Cake tastes just like a slice of chocolate cake, but it takes so much less work to make. Just whisk the ingredients together, pop it in the microwave, and enjoy that rich chocolate goodness!

Prep Time 5 minutes
Cook Time 1 minute
Total Time 6 minutes


  • 3 tablespoons flour
  • 2 tablespoons sugar
  • 1 1/2 tablespoons cocoa powder
  • 1/4 teaspoon baking powder
  • pinch of salt
  • 3 tablespoons milk
  • 1 1/2 tablespoons vegetable oil
  • 1 tablespoon peanut butter


  1. In a large mug, whisk (with a small whisk or large fork) together the dry ingredients (flour, sugar, cocoa powder, baking powder and salt). Add the milk, vegetable oil and peanut butter. Whisk until smooth.
  2. Cook in the microwave on high for 1 minute and 10 seconds. This recipe will rise a lot and then deflate. I know it’s strange, but trust me it’s delicious! Serve immediately!


Sometimes I like to stir in mini marshmallows or some chopped walnuts to add a little something different! Add both and it’s like a Rocky Road Mug Cake!

Nutrition Information:



Serving Size:


Amount Per Serving: Calories: 512Total Fat: 30gSaturated Fat: 4gTrans Fat: 1gUnsaturated Fat: 23gCholesterol: 4mgSodium: 355mgCarbohydrates: 54gFiber: 3gSugar: 26gProtein: 9g


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Chocolate Peanut Butter Mug Cake - I found the secret to the best mug cake, no egg!

This post may contain affiliate links. Read my disclosure policy.

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285 Responses
  1. B

    I’ve never made nor seen a mug cake recipe with an egg in it. That’s absurd.

    While the texture of this eggless recipe was a pass (and the same as other recipes I’ve tried), it tasted like crap. It was not sweet at all, not chocolatey and not peanut butter-y in the least. Just make a real cake and exercise some self control, folks.

  2. Diedra

    I am obsessed with this! I replace the oil with melted butter and add a teaspoon or two of applesauce for moisture plus a tablespoon more of peanut butter! This is my addiction

  3. Carolyn

    Well that was yummy! I’m so glad there isn’t a whole pan full waiting for me!
    Now I need a single serving sticky bun and all my cravings can be satisfied.

  4. Ann

    You cracked the mug-cake code! I too tried one years ago with the egg in it. it was gross- eggy, spongy, and stuck so bad! I had to soak it forever to clean it. Until now I tried yours and bam! It was great except I didn’t believe it was ready at 1 min 10 sec, and I gave it an extra 20 seconds. Big mistake, it was a little too dry. But pretty close to perfect! Next time I will follow your recipe exactly.

  5. Angie

    U must have done something wrong. I’ve made this mug cake over 100 times and it’s never turned out anything but yummy! Gooey, warm and delicious!

  6. Patricia Easley

    I just tried the peanut butter/ chocolate mug cake. It was very good. I added a scoop of ice cream. I will be making this again. No worry about a big cake going old. Just enough cake for little dessert treat.

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I'm a trial & error, self taught, sugar addict who thankfully learned how to survive in the kitchen! I am also a wife, mama of 3.
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