This microwave peanut butter mug cake is nutty and rich yet keto, low carb, and gluten-free. It makes the perfect healthy breakfast or sugar-free dessert for one in 1-2 minutes. Make it with just 6 ingredients: peanut butter, almond flour, butter, egg, sugar substitute, and chocolate chips. It will satisfy your cravings without the guilt – just like our chocolate cake in a mug! Don’t you just love that?
In need of a guiltless treat right in the morning? Well, we have the perfect one for you! This keto peanut butter mug cake can be prepared in a jiffy… yet is quite delish and satisfying. The cake itself is moist and comes with a swirl of melted dark chocolate and a bunch of chocolate chips. It is a treat for both the eyes and the belly!
See why you have so many reasons to make this healthy cake in a mug.
The Best Keto Peanut Butter Mug Cake Ever
When I say this recipe for mug cake is THE ‘IT ’ recipe, I mean it! Come see why:
- It’s moist, nutty, buttery, and rich!
- Made with only 6 ingredients: creamy peanut butter, almond flour, unsalted butter, sugar substitute, egg, and dark chocolate chips. In other words… it’s one of those budget-friendly and easy pantry recipes.
- Quick: it’s cooked in the microwave for 1 or 2 minutes
- Versatile: you can make it for breakfast or as a dessert!
- This mug cake is cheap and healthy!
- Mess-free: you will wind up with just one or 2 mugs to clean!
- It’s naturally gluten-free, keto, and low carb. Moreover, it can be dairy-free if made with dairy-free butter.
- Ideal for college students who live in a dorm and also for busy people rushing in the morning to grab a bite before going to work or school.
- Also, it’s perfect for those who want to quickly satisfy their cravings but have diabetes, PCOS, or are on a keto diet!
How awesome, right?
What's a mug cake?
A mug cake is literally a cake prepared and cooked in a mug! There are different recipes and flavors but most of them cook faster in the microwave for about 1 to 2 minutes, depending on the potency of your microwave. It’s quite simple to prepare too: all you need to do is to mix ingredients in a mug and microwave, making it mess-free.
Why is this recipe for peanut butter mug cake made with eggs?
Mug cakes made with eggs have a spongy texture and are more cakey than fudgy. They are also puffy because there is a protein structure (egg) to help them rise, and the almond flour will hold the shape better.
But because they are also more on the dry side, we added melted chocolate to the batter to make this one a bit fudgy too.
This will make the top center soft and creamy while from the middle to bottom it is more solid.
If you don’t have a microwave, no worries! This chocolate peanut butter mug cake will bake well in the oven because it will rise due to one of its ingredients – egg. It’s one of many 5-ingredient or less recipes that you won’t regret trying!
Can it be baked in the oven?
Yes, it can! To do that, preheat the oven to 350 degreesF/180 degrees C and bake our peanut butter cake in a mug for 10-15 minutes. It's key not to omit adding the almond flour to the peanut butter mixture in order to give this healthy mug cake a real cake structure. But it will cook much faster in the microwave-- about 1-2 minutes!
How to make peanut butter mug cake
- Get all ingredients together. SEE PIC. 1 In a 12-ounce mug, melt 1 tablespoon of unsalted butter in the microwave, about 20-30 seconds, or until melted. Then, stir in the peanut butter, almond flour, egg, and sugar substitute until the mixture is combined. SEE PIC. 2
- In a small bowl, melt ½ tablespoon of unsalted butter with 2 tablespoon of chocolate chips in the microwave, about 45-60 seconds until chocolate is melted. Stir very well until chocolate is smooth.
- Pour melted chocolate on the top center of the peanut butter mixture and draw a few swirls with a chopstick or the tip of a paring knife. SEE PIC. 3 Add about 1 tablespoon of chocolate chips on top and microwave for about 60 to 80 seconds or until cooked and well set. SEE PIC. 4
- Let cool for at least 2 minutes before enjoying warm. If you want, serve with a scoop of vanilla ice cream on top.
Substitutions
- Peanut butter: for any other nut butter, or Nutella
- Sweetener: sugar, brown sugar, maple syrup, xylitol, etc
- Egg: ¼ cup mashed banana = ⅓ cup applesauce
- Almond flour -- use coconut flour instead, about ⅓ of the amount for almond flour (or 1 tsp)
Cooking/baking tips
- To avoid spill, be sure to use a mug that is large enough, as the batter will rise a lot in the microwave. I suggest using at least a 10 to 12-ounce mug for this recipe because the batter will rise quite high during the cooking process.
- Keep a close eye on the mug cake while it is in the microwave to avoid spillage.
- Cook it only until the center is just set. The final cooking time will depend on 1) The potency of your microwave. In a 1200 Watts microwave, it takes around 1 minute. 2) If your mug is wider than taller. Wider mugs will have the cake batter spread out and so, it will cook faster than if in a deep or tall mug. In addition, it will take more time to bake (10-15 minutes) than to cook it in the microwave (1-2 minutes). Stick to standard shaped mugs. Why? Because mugs that are too tall/skinny or have an odd shape may cause the cake to not cook evenly. I find wide mugs cook this type of cake better and faster! Do not overcook the cake. A few seconds can make a big difference. But if you find your cake not fully cooked, cook it a little longer at 10-15 second intervals.
Storage
Eat this peanut butter mug cake warm to enjoy the melted chocolate goodness. But you can cover the mug once the cake cools and store in the fridge for up to 24 hours. Eat cold, or heat covered in the microwave for about 20-30 seconds, or until warm.
Other Healthy Breakfast Recipes:
- How to make an omelette easy
- How to make the perfect oatmeal
- Sunny side up eggs
- How to hard boil eggs
- Starbucks egg bites
- Caprese breakfast egg cups
- Oatmeal chocolate chip cookies
- Bife a cavalo (steak and eggs)
PIN & ENJOY!
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Peanut Butter Mug Cake (Keto)
Equipment
- Mug
- microwave
Ingredients
- 1 ½ tablespoon unsalted butter
- 3 tablespoon creamy peanut butter
- 1 tablespoon blanched almond flour
- 1 large egg at room temperature
- 2 tablespoon Swerve granulated (or other)
- 3 tablespoon dark chocolate chips sugar-free or keto
Instructions
- In a 12-ounce mug, melt 1 tablespoon of unsalted butter in the microwave, about 20-30 seconds, or until melted. Then, stir in the peanut butter, almond flour, egg, and sugar substitute such as Swerve or goldenmonk fruit until the mixture is combined.
- In a small bowl, melt ½ tablespoon of unsalted butter with 2 tablespoon of chocolate chips in the microwave, about 45-60 seconds or until chocolate is melted. Stir very well until chocolate is smooth.
- Pour melted chocolate on the top center of the peanut butter mixture and draw a few swirls with a chopstick or the tip of a pairing knife. Add about 1 tablespoon of chocolate chips on top and microwave for about 60 to 80 seconds or until cooked and well set.
- Let cool for at least 2 minutes before enjoying warm. If you want, serve with a scoop of vanilla ice cream on top.
Recipe Notes
- Peanut butter: for any other nut butter, or Nutella
- Sweetener: sugar, brown sugar, maple syrup, xylitol, etc
- Egg: ¼ cup mashed banana = ⅓ cup applesauce
- Almond flour -- use coconut flour instead, about ⅓ of the amount for almond flour (or 1 tsp)
- To avoid spills, be sure to use a mug that is large enough, as the batter will rise a lot in the microwave. I suggest using at least a 10 to 12-ounce mug for this recipe because the batter will rise quite high during the cooking process.
- Keep a close eye on the mug cake while it is in the microwave to avoid spillage.
- Cook it just until the center is just set. The final cooking time will depend on 1) The potency of your microwave. On a 1200 Watts microwave, it takes around 1 minute. 2) If your mug is wider than taller. Wider mugs will have the cake batter spread out and so, it will cook faster than if in a deep or tall mug. In addition, it will take more time to bake (10-15 minutes) than cook it in the microwave (1-2 minutes). Stick to standard shaped mugs. Why? Because mugs that are too tall/skinny or have an odd shape may cause the cake not to cook evenly. I find wide mugs cook this type of cake better and faster! Do not overcook the cake. A few seconds can make a big difference. But if you find your cake not fully cooked, cook it a little longer at 10-15 second intervals.
Nutrition
** Nutrition labels on easyanddelish.com are for educational purposes only. This info is provided as a courtesy and is only an estimate, since the nutrition content of recipes can vary based on ingredient brand or source, portion sizes, recipe changes/variations, and other factors. We suggest making your own calculations using your preferred calculator, based on which ingredients you use, or consulting with a registered dietitian to determine nutritional values more precisely.
Please note that health-focused and diet information provided on easyanddelish.com is for educational purposes and does not constitute medical advice, nor is it intended to diagnose, treat, cure, or prevent disease. Consult with your doctor or other qualified health professional prior to initiating any significant change in your diet or exercise regimen, or for any other issue necessitating medical advice.
Aarthi | Prepbowls says
Omg, Denise! I am drooling for the cake, Absolutely fudgy and chocolatey. I always wanted to try microwave mug cake, but never attempted too, with very few ingredients and only two minutes makes me excited about the cake. Thank you for sharing this recipe, Will sure try this.
Denise Browning says
Hi Aarthi! This keto peanut butter mug cake is quick, easy, and quite delish. One can eat for breakfast or as a sugar-free dessert without the guilt.
John / Kitchen Riffs says
This looks great. Mug cakes re always so much fun -- and they're perfect portion control. Good stuff -- thanks.
Denise Browning says
My new favorite mug cake because it is keto, quick, and as you see quite scrumptious.
Raymund says
Now thats what you call a perfect mug cake! I can have this anytime
Denise Browning says
It was one of the most delicious mug cakes that I have ever had especially made in 2 minutes in the microwave.