This easy Chocolate Chip Peanut Butter Protein Mug Cake recipe is the perfect delicious treat to satisfy your sweet cravings while getting in an extra serving of protein. Enjoy it as a post-workout high-protein snack or macro-friendly dessert. This single serving easy protein powder mug cake recipe is gluten free and made with simple healthy ingredients you'll likely already have as pantry staples at home!

For those days where your sweet or chocolate cravings are at an all time high, but you know you still have high protein goals to reach, this easy high protein mug cake recipe is the perfect way to have your cake and eat it, too. Literally! Enjoy this single-serve protein mug cake as a healthy breakfast option instead of a protein shake, have it as a post-workout snack, or of course enjoy this perfect sweet treat for dessert without the sugar crash.
If you're looking for other ways to add more protein to your day, try any of these low calorie, high protein breakfast options: blueberry protein muffin, gluten-free blueberry oatmeal protein pancake, protein hot chocolate, or a classic green goddess protein smoothie.
Love mug cakes? Try this 3 Ingredient Chocolate Protein Mug Cake , 3 Ingredient Chocolate Banana Mug Cake , Protein Mug Brownie, Funfetti Mug Cake, or this 3 Ingredient Cake Mix Mug Cake!
Why You'll Love This Mug Cake Recipe
- It's a healthy dessert. This healthy mug cake recipe is made with simple, gluten-free ingredients, proving that a clean-eating dessert can be just as decadent as the original. It is the perfect guilt-free treat to satisfy your sweet tooth without the sugar crash.
- It is high protein. By using a high-quality protein powder as the main ingredient and adding a whole egg, this recipe delivers approximately 30 grams of protein per serving (depending on the protein powder you choose). It’s an ideal macro-friendly dessert or a muscle-building post-workout snack.
- It's easy & fast. It’s the ultimate quick microwave protein dessert for when those late-night cravings hit and you need a single-serve healthy snack fast! Requiring basic ingredients and just around 3 minutes of your time, you'll be enjoying this delicious treat in no time!
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Chocolate Chip Peanut Butter Protein Mug Cake Ingredients & Tested Substitutions
- Vanilla Protein Powder. You can use whey protein powder, vegan protein powder, or whatever your favorite protein powder is. My personal favorite brand of protein powder makes a grass-fed beef protein powder that I find both incredibly delicious as well as easier to digest than a whey protein. If you're vegan or vegetarian, this gut friendly protein powder comes in vanilla & chocolate and is an amazing choice. This link will also save you 15% off of your first order!
- Oat Flour. Be sure to look for certified gluten free oats if you are gluten free. If you have oats at home & do not want to buy oat flour you can simply add ⅓ cup to a blender and pulse until fine. You can use almond flour for a low carb option, but I find that oat flour provides a better texture.
- Powdered Peanut Butter. I like to use peanut butter powder to infuse the peanut butter flavor without a lot of extra calories or fat.
- Milk. You can use whatever type of milk you prefer. My personal favorites are non-dairy milk like oat milk or unsweetened almond milk.
- Egg. This recipe calls for one large egg. If you're making a vegan protein mug cake, you can use 1 flax egg instead.
- Vanilla Extract. This isn't necessary, but I find it adds a nicer flavor to the protein mug cake. Opt for a high quality vanilla extract for best results.
- Baking Powder. Since we're using gluten free flours as opposed to an all purpose flour, adding baking powder helps the mug cake rise.
- Chocolate Chips. Dark chocolate or milk chocolate chips will work.
Note that there is no added sugar in this recipe. The protein powder I prefer has a touch of monkfruit in it, so additional sweetener isn't needed. If your preferred brand isn't sweetened and you'd like to add sweetness, you can add 2 teaspoon of maple syrup, coconut sugar, white sugar or your preferred sweetener of choice.

Step By Step Instructions For This Protein Mug Cake Recipe
- Prepare the batter. In a large microwave-safe mug or large ramekin, combine the dry ingredients (protein powder, oat flour, baking powder and powdered peanut butter) with the wet ingredients (egg or flax egg, milk and vanilla extract), whisking vigorously until no clumps remain. The batter should be the texture of cake batter. Add in half of the chocolate chips, stirring to fully incorporate them into the batter.


2. Cook the mug cake. Place the coffee mug or ramekin into the microwave. Microwave for 50 seconds, then stir and check the texture. Depending on the power of your microwave you may need to cook an additional 10-20 seconds, but do this in 5-10 second intervals to avoid the mug cake taking on a rubbery texture. Once cooked, top with the remaining half of the chocolate chips.


Protein Mug Cake Recipe FAQs
When is the best time to eat a protein mug cake?
This delicious mug cake can be enjoyed as a quick, easy breakfast or a healthy high-protein snack. Of course it's always a good reason to enjoy dessert, too, especially when that cake craving hits!
Can I store protein mug cake?
Protein mug cakes are meant to be enjoyed right away. I do not recommend making them ahead of time and storing them, however if you can't finish the entire serving, you can always cover your mug with plastic wrap and keep it in the fridge for no more than 1-2 days. You can warm it back up in the microwave when you're ready to enjoy it again, just note the texture may change depending on the brand of protein powder you've used.
What type of protein powder should I use?
Some types of protein powders will microwave better than other types. But in my experience, any type of protein powder will work for this recipe, so use your favorite! I prefer to use vanilla flavored protein powder, but you can use unflavored or even chocolate protein powder to make this a peanut butter double chocolate protein mug cake recipe! Just keep in mind that vegan proteins/protein powders tend to absorb more liquid, so you may need to add an extra 1 tablespoon of milk to keep the cake from becoming too dry in the microwave. If you're looking for a helpful guide on easy to digest protein powders, check this post out!
What if the mug cake is too liquidy?
Occasionally, depending on your microwave, you may find that your protein mug cake hasn't fully cooked through and is still a bit liquidy on the inside. If this happens, simply place the mug back in the microwave and cook in short 5 second intervals until a cake-like texture is achieved.
How do I keep my protein mug cake from being rubbery?
The secret to a moist protein mug cake is to avoid overcooking it. Since protein powder can toughen quickly, microwave the cake for 50 seconds, then stir and check the texture. Depending on the power of your microwave you may need to cook an additional 10-20 seconds, but do this in 5-10 second intervals to avoid the mug cake taking on a rubbery texture. Remember, the cake will continue to firm up as it cools for a minute or two!
Can I make this protein mug cake without eggs?
If you want an egg-free protein mug cake, you can swap the egg for a flax egg or ¼ cup of mashed banana or applesauce. Note that using a fruit puree will make the cake denser and slightly change the flavor profile, but it will still be a delicious healthy snack or dessert.
Where do I find oat flour?
You can find oat flour in many grocery stores or on Amazon. I like Anthony's and Bob's Red Mill gluten free oat flour. You can also make your own oat flour at home by adding gluten-free oats to a blender and pulsing until fine.
Is this protein mug cake recipe gluten-free?
This is a naturally gluten-free protein dessert because it uses protein powder as the primary "flour" base instead of wheat. Just ensure your specific brand of protein powder, oat flour, and chocolate chips are certified gluten-free if you have a high gluten sensitivity or Celiac disease.
If You Liked This Recipe You Might Also Enjoy:
- Protein Hot Chocolate
- Grain Free Blueberry Protein Muffins
- Grain Free Carrot Cake Protein Muffins
- Gluten Free Blueberry Oatmeal Protein Pancakes
- 3 Ingredient Chocolate Protein Mug Cake
- Best Protein Powder Mug Brownie (No Egg Gluten Free)
- Best Quick & Easy 2 Ingredient Oreo Mug Cake Recipe
Did you have a chance to make this recipe? If so, please leave me a 5 star rating and review below. I always love and appreciate hearing from you!

Chocolate Chip Peanut Butter Protein Mug Cake
Equipment
- 1 Large microwave safe coffee mug
- 1 Small whisk or fork
Ingredients
- 1 scoop vanilla protein powder
- ⅓ cup oat flour
- ½ teaspoon baking powder
- 2 tablespoon peanut butter powder
- 1 large egg or flax egg
- ¼ cup plus 1 tablespoon milk of choice
- 1 teaspoon vanilla extract
- 2 tablespoon chocolate chips
Instructions
- Prepare the batter. In a large microwave-safe mug or large ramekin, combine the dry ingredients (protein powder, oat flour, baking powder and powdered peanut butter) with the wet ingredients (egg or flax egg, milk and vanilla extract), whisking vigorously until no clumps remain. The batter should be the texture of cake batter. Add in half of the chocolate chips, stirring to fully incorporate them into the batter.
- Cook the mug cake. Place the coffee mug or ramekin into the microwave. Microwave for 50 seconds, then stir and check the texture. Depending on the power of your microwave you may need to cook an additional 10-20 seconds, but do this in 5-10 second intervals to avoid the mug cake taking on a rubbery texture. Once cooked, top with the remaining half of the chocolate chips.





Christopher says
My buddy Chris shared this. It was dope I more or less had all the ingredients (subbing in chocolate protein powder and peanut butter chips) around the house. Loved the suggestion to blend up some oats to make my own oat flour. Yeah. Delicious hit the spot and I’ll do it again!
prettydeliciouslife says
Hell yea I'm so happy to hear you liked it! It's on heavy rotation at my house, too 🙂