An actually simple super fudgy Peanut Butter Protein Mug Cake made with a load of protein powder and peanut butter powder, and no flour! This half baked fudgy protein mug cake is a great low carb and low calorie dessert.

Okay I was hella surprised by the macros of this whey protein mug cake; I knew it would be low carb since it’s flawless (just a bit of coconut flour), but the numbers here were just beautiful!

Such a low calorie mug cake since its made with peanut butter powder instead of peanut butter and no sugar or eggs either. Just gooey indulgence here!

Ingredients for Fudgy Peanut Butter Protein Mug Cake

This single serve fudgy peanut butter protein mug cake is made with a few simple and healthy ingredients, and has no flour, butter or oil and no sugar either!

Vanilla Protein Powder for healthy, whey protein protein mug cake that’s also sugar free
I used Quest Nutrition Vanilla Milkshake protein powder here.
ProteinWorld Whey and ProteinWorld Slender Blend are also great options. Code HAYLSKITCHEN gets you a discount on both.
Peanut Butter Powder, also known as Powdered Peanut Butter. I recommend Lakanto for a sugar free version (the code HAYLSKITCHEN gives you a discount). Or you could use the one from PbFit or PB2 too.

or Peanut Butter (Recommentation: American Dream Nut Butter White Chocolate Pretzel Peanut Butter; Code HAYLSKITCHEN gives you a discount.)
See alternatives section below.

Coconut Flour for a low carb protein mug cake
Egg Whites for extra protein
Unsweetened Almond Milk
A bit of Vanilla Extract
Baking Powder

And then of course.. Chopped Chocolate or Chocolate Chips!
I use the white chocolate chips from Lily’s here.
I’d also recommend the sugar free ones from Lakanto. Use my code HAYLSKITCHEN for a 15% discount on all the Lakanto products on their website!

If you need to add more sweetness, Stevia Powder or Zero Calorie Sugar Substitute; I use Lakanto, to keep this peanut butter mug cake recipe sugar free; (code HAYLSKITCHEN for a discount here too)

Tips to make Fudgy Protein Mug Cake with No Flour

This fudgy flourless protein mug cake really is a simple one and made in a mug or ramekin, but make sure you do all of this stuff to get is perfect.

Grease the ramekin! You want the mug cake to come off easily.
Use an oven-safe mug if you need.

Don’t over-mix the batter!
Make sure you gently stir the wet and dry to combine them.
If you over-mix it, protein powder will make your protein mug cake tough, dense and gummy.

Taste the batter and see if you need some extra sweetener. I’d recommend using stevia powder to maintain the consistency of the batter.

Don’t overbake the mug cake. The top will should be just cooked. It might look soft, but will harden when it cools a bit.
It will continue to cook when out, and you want the proper fudgy center.

Alternates for this Healthy Peanut Butter Powder Protein Mug Cake

I recommend making this healthy low calorie protein mug with whey protein powder and peanut butter powde since it gives the best results.

If you need other options for the flours and such, here’s some alternatives for a healthy peanut butter protein powder mug cake for one:

Peanut Butter Powder: 4 tsp Peanut Butter, and also reduce the amount of milk to maybe 2 Tbsp
I’d recommend American Dream Nut Butter White Chocolate Pretzel Peanut Butter; Code HAYLSKITCHEN gives you a discount.
Coconut flour: Try using about 3 Tbsp of Almond Flour

Egg Whites: 2 Tbsp aquafaba (chickpea liquid). I haven’t given this a try yet though.
Almond Milk: Any other milk

A Simple Vegan Protein Mug Cake Recipe

This fudgy protein mug cake recipe has no butter or milk and can easily be made Vegan too.

For the perfect Vegan protein fudge mug cake, make sure you use a plant based protein powder and aquafaba.

ProteinWorld has a Vegan protein blend that would work well here (HAYLSKITCHEN for the discount here too).

More Single Serving Protein Mug Cake Recipes

More Peanut Butter Powder Protein Recipes: