In the mood for something amazing? Try out this low carb Keto Peanut Butter Mug Cake recipe. It can be made in just a couple of minutes, and it’s perfect for curing that sweet tooth. Soft, delicious peanut butter cake with an incredible texture and peanut butter flavor is just moments away! You don’t have to worry about it because it’s also gluten-free, grain-free, and sugar-free too.
We all have our weaknesses when it comes to dessert, and while I have a few, mug cakes are quickly becoming a major one. The flavors are so scrumptious, and there are so many varieties you can make. Not to mention the fact that you never have to even heat up the kitchen by running the oven. Plus, there are hardly any dishes to clean up, and you can be nibbling on it in no time.
There are days when I feel like I could eat a full-size cake all by myself! So, if I make this satisfying keto peanut butter mug cake, I can enjoy a treat without over-indulging. Eating the entire cake isn’t as big of a deal when it’s a single serving low carb microwave dessert recipe!
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Ingredients
Peanut Flour - I chose to use peanut flour for a more intense peanut flavor than using almond flour and peanut butter. But if you want you can try swapping in a combination of almond flour and creamy or chunky peanut butter in place of the peanut powder.
Coconut Flour -Coconut flour works well in this recipe in conjunction with the peanut butter powder.
Sweetener - I use a blend of granular sweeteners with stevia but I offer alternatives in the recipe card.
Salted Butter - The bit of added salt enhances the other flavors in this mug cake recipe. If you have unsalted butter just add a pinch of salt.
Baking Powder - Make sure your baking powder is fresh so the cake rises properly.
Egg Yolk - An entire large egg would make this cake much too eggy. Using just one egg yolk is perfect. Save the egg white for another use.
Sour Cream - Sour cream makes the cake moist. Greek yogurt is a good sub, if needed.
How To Make a Keto Peanut Butter Mug Cake
Just like most mug cakes, you are simply going to combine some ingredients, warm it up, and dig in! It’s truly as easy as you can get, but the result is heavenly. Make a mug cake peanut butter and delicious today!
First Step: Using a large mug, combine the butter, sweetener, peanut flour, coconut flour, egg yolk, sour cream, baking powder, vanilla, and a tiny pinch of salt. Once it’s mixed well, put it in the microwave for 1 minute.
That’s it, and now you have a perfect single-serving dessert to enjoy.
Variations And Ideas
Many evenings you will find me happily munching on this low carb peanut butter mug cake recipe without a care in the world. I typically make it how I have written it in the recipe, but sometimes I get a craving to add in something a bit extra. Try out some of these ideas to see what you like best:
Peanut Butter - After your cake has cooked in the microwave, drizzle a little bit of sugar-free natural peanut butter on top. It adds to the already amazing peanut butter flavor and looks lovely too.
Chocolate Chips - Love the peanut butter chocolate combo? Adding some sugar-free chocolate makes everything a little better right? Sprinkle in 1 tablespoon of sugar free chocolate chips before cooking the keto peanut butter mug cake or set a few on top after. Either way, some warm chocolate chips are divine.
Melted Chocolate - Just like adding chocolate chips, I will sometimes drizzle some melted sugar-free chocolate on top. It’s lovely when you do the chocolate and peanut butter. You don’t need a lot, but it sure tastes great and makes them look even prettier.
Sugar-Free Whipped Cream - The coolness of the whipped cream, paired with the warm mug cake is out of this world! You have to try it to understand how incredible it is.
Ice Cream - Cake and ice cream are a perfect match, so it makes sense to have a little bit with your warm, melty mug cake. Yum!
Common Questions
How do I make a mug cake keto?
In order to convert a regular mug cake recipe that uses flour and sugar to a low carb recipe you will have to sub out those ingredients. You can try almond flour in place of wheat flour and your favorite sugar substitute sweetener in place of the sugar. Just making those two swaps greatly reduces the net carbs. If the recipe also calls for butter, sour cream, plain yogurt, eggs, cocoa powder, vanilla, and/or cream cheese those are all gluten free and keto friendly.
Can I add frosting?
Of course! This has a mild peanut butter flavor on its own so to really kick that up a notch try some Peanut Butter Frosting. Other great choices are Keto Cream Cheese Frosting, Buttercream Icing, or Keto Chocolate Frosting.
Can I save leftovers?
Yes, if you only craved a taste and didn’t need the entire keto peanut butter mug cake, you can save it for later. Wrap it up, so it’s airtight and place the mug cake in the refrigerator. Then when you are ready to eat it, you can either warm it up or enjoy it cold. I think it tastes best cold or just warmed, so I just put it in the microwave for 10-20 seconds. It heats up fast, so don’t let it warm up for too long.
For an amazing chocolate peanut butter treat try my Keto Peanut Butter Cheesecake!
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Ingredients
- 2 tablespoon butter
- 1 tablespoon Joy Filled Eats Sweetener (or see alternatives in recipe notes)
- 2 tablespoon peanut flour
- 1 tablespoon coconut flour
- 1 egg yolk
- 1 tablespoon sour cream
- ¼ teaspoon baking powder
- ¼ teaspoon vanilla
- tiny pinch salt
Instructions
- Stir together all the ingredients in a large microwave safe mug.
- Microwave for 1 minute.
Notes
Nutrition
Mug cakes are the perfect size when you are in the mood for a sweet treat. If you enjoy this easy keto cake in a mug, take a look at these keto mug cake recipes too!
- Keto Vanilla Mug Cake
- Keto Black Bottom Mug Cake
- Chocolate Pecan Mason Jar Cake
- Keto Mug Brownie
- Cannoli Mug Cake
Originally Published
Nicky says
So yummy!! I love the texture of this peanut butter mug cake!! Thank you for all the great recipes!
Angie says
Question your recipes that use coconut flour and almond flour …can I just use THM baking blend?
Taryn says
Yes, in most recipes you can sub in baking blend. I recommend using a bit less. If I call for 1 cup total of the other flours I'd sub in 1 cup minus 1 tablespoon of baking blend.
Kristi says
I can't wait to try this! Since I like a lot of peanut butter flavor, I'm thinking of using the THM Peanut Butter Natural Burst to add to the flavor without adding more fat.
Taryn says
That's a great idea! I need to try that one.
Jenn says
My daughter and I have been on a major peanut butter kick lately and this sweet treat is perfect for when we want dessert without all the fuss! Thanks for the recipe!
wilhelmina says
I loved the flavor and texture of little mug cake! A great way to beat a sudden sweet tooth!