Chocolate Protein Mug Cake

Protein Mug Cake is a healthy, flourless alternative to traditional mug cake recipes. Each bite of sweet, tender protein cake in a mug is packed with healthy fats, protein, and nutrients to give you the boost of energy you need!

Protein Mug Cake on a plate

Delicious Protein Mug Cake

I have been seeing a lot of mug cake recipes floating around Pinterest, Instagram, and Facebook. While the idea is great, a lot of these single-serve “mug of cake” recipes are higher in calories than a regular slice of cake!

That’s why I’m really into protein mug cake — each serving keeps you feeling full without the added calories that flour-based ones have.

Sure, cooking anything in the microwave kills most of the nutrition. But when the options are to go out and buy a McCain Chocolate Cake (and devour the whole thing) or make a protein powder mug cake, I go for mug cake!

This particular protein cake in a mug is made with PB2, a favorite peanut butter alternative of mine. Craving the real thing? Be sure to check out more of my peanut butter recipes

Why You Will Love Protein Cake in a Mug

  • Healthy dessert – load of protein and nutrients
  • Ready in minutes – just mix and microwave
  • Customizable – try different flavors and toppings
  • Naturally gluten free – when you use the products listed

Protein Mug Cake Recipe Tips

There really isn’t much to it – mix together the ingredients, pour the batter into a greased heat-safe mug, and microwave until fluffy!

While your protein mug cake is cooking, whisk together a simple drizzle topping for an extra touch of sweetness.

Try Different Powders

First, choose your favorite protein powder — that’s where the biggest boost comes from! I typically have Dymatize Elite on hand. I have used the Cafe Mocha and Cookies n’ Cream flavors for this protein mug cake recipe, and both taste great.

Next up is the PB2, which is simply powdered peanut butter (or peanut flour). I have it in both regular and chocolate. Just Great Stuff is an organic powdered peanut butter without any added sugar, and it makes a great substitute for your protein powder mug cake. I use both.

Make Note of the Texture

This isn’t your average mug cake! Remember, there is NO FLOUR in this recipe, so the texture is more sponge-like.

You may also notice a difference in consistency if you use a different protein powder. Some absorb liquid more than others, so you may need to experiment until your protein cake in a mug comes out just right.

Use the Whole Egg

You can substitute 4 egg whites for one egg, but it only saves you about 10 calories. You may as well use the whole egg in your protein chocolate mug cake to get all of the benefits.

And what are those, you may ask? First, the yolk contains the bulk of an egg’s iron, folate, and B12. It also houses loads of vitamins and nutrients, including several that support eye and brain health.

You will also find plenty of healthy fats, including omega-3, in the yolk of an egg. Finally, you can’t forget about the antioxidants and heart-healthy amino acids.

sliced protein mug cake with drizzle on white plate

Frequently Asked Questions about Protein Powder Mug Cake

Are protein mug cakes healthy?

They are certainly healthier than the traditional versions! My protein mug cake recipe is loaded with protein from protein powder, PB2, and eggs. There are also plenty of other vitamins and nutrients, so you can feel good about your sweet treat.

In fact, it’s also a great option for breakfast since it will keep you feeling full well into your morning.

What toppings can you add to mug cake?

I like to top my protein chocolate mug cake with a simple drizzle made from extra peanut flour and almond milk. If you aren’t worried about the extra calories, some homemade whipped cream or a few chocolate chips would be delicious!

Or, try some fresh fruit slices instead. Bananas are the perfect flavor pairing for chocolate and peanut butter, but strawberries and raspberries can be tasty too.

Can you make mug cakes in ramekins?

Absolutely! Any microwave-safe vessel will do, as long as it is large enough for the batter to expand. A good rule of thumb is to use a mug that holds about twice the volume as the batter.

More Protein Powder Recipes:

No Bake Chocolate & Cranberry Bars

Oatmeal Raisin Cookie Shake

Strawberry Pina Colada Shaved Ice

Lemon Almond Protein Pancakes

Choco-Mochanut Protein Mug Cake
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5 from 1 vote

Chocolate Protein Mug Cake

Protein Mug Cake is a healthy, flourless alternative to traditional mug cake recipes. Each bite of sweet, tender protein cake in a mug is packed with healthy fats, protein, and nutrients to give you the boost of energy you need!
Course Dessert
Cuisine American
Keyword protein mug cake
Prep Time 5 minutes
Cook Time 2 minutes
0 minutes
Total Time 7 minutes
Servings 1
Calories 247kcal


  • 1/8 cup cocoa powder
  • 1/8 cup chocolate PB2
  • 1/4 cup unsweetened vanilla almond milk
  • 1 egg
  • 3 packages stevia
  • 1/2 scoop cafe mocha protein powder

Drizzle Topping

  • 1 tablespoon Just Great Stuff or PB2
  • almond milk just enough to make it pourable


  • In a bowl combine all ingredients (except drizzle). Spray a mug with non stick spray, pour in batter and microwave 30 seconds at a time until cooked (mine took 1 1/2 minutes).
  • Combine drizzle ingredients and pour.


Calories: 247kcal | Carbohydrates: 25g | Protein: 26g | Fat: 10g | Saturated Fat: 3g | Polyunsaturated Fat: 1g | Monounsaturated Fat: 2g | Trans Fat: 0.02g | Cholesterol: 181mg | Sodium: 415mg | Potassium: 521mg | Fiber: 10g | Sugar: 6g | Vitamin A: 288IU | Calcium: 236mg | Iron: 3mg
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What’s your favorite mug cake recipe? Have you ever tried adding protein powder to it?

7 comments on “Chocolate Protein Mug Cake”

  1. Oh my goodness, Randa! This looks amazing! I’m going to have to try making this sometime this week!

    • It’s so good. My friend also just gave me a recipe for this:
      2 scoops protein powder
      4 Egg whites
      1/4 cup almond milk

      Mix and microwave 1 1/2 -2 minutes, drizzle with PB2 or melted peanut butter.

      I tried it and could only eat half it was so filling. I also added some Stevia to that version as well (I like things sweet).

  2. I have never thought to add protein powder to recipes other than shakes. This mug cake looks so good!

  3. What a neat idea! I’ll have to give this a try; I’m a protein nut too!

  4. Although I have heard of mug cakes I have never had one before! I have to say the idea of having something so tasty with such good ingredients in it is very appealing. Might have to give this one a try…

  5. I love a good mug cake! I’ve never even considered using protein powder in baking before!

  6. What is PB2? 

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