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For a sweet treat without any tradeoffs, this chocolate protein mug cake recipe is the perfect combo of delicious and healthy food! I’m a big fan of making sweet treats with hidden protein ingredients, like protein muffins, healthy rice krispie treats, protein balls, and even protein donuts. But all of these take time, and sometimes you just want a quick fix. That’s where this protein powder mug cake comes in: It’s ready in just a few minutes and will satisfy a chocolate craving fast.
If you prefer a quick chocolate mug dessert without the protein powder, try a classic chocolate mug cake or a keto mug brownie.
What Is A Protein Mug Cake?
A protein powder mug cake contains many of the elements of traditional cake (such as sweeteners, eggs, and baking powder) and cooks them in a single serving — usually in a mug with a microwave! These cakes make the perfect healthy dessert or workout snack.
Many mug cake recipes use high-carb ingredients like maple syrup, oat flour, or banana, but this one uses other healthy swaps for minimal carbs. In addition to the protein powder, the egg and almond flour also add proteins.
Why You’ll Love This Protein Mug Cake Recipe
- Rich chocolate flavor
- Moist, decadent, cakey texture
- Cooks in under 2 minutes
- 36 grams of protein per serving (!!)
- Naturally gluten-free and keto friendly
- No oven needed (but there’s an oven option if you want it!)

Ingredients You’ll Need
This section explains how to choose the best ingredients for easy protein mug cake, what each one does in the recipe, and substitution options. For measurements, see the recipe card below.
- Paleovalley Bone Broth Protein Powder – The best clean protein powder for mug cakes! It blends easily and has a neutral flavor for sweet or savory dishes. This mug cake uses 2 tablespoons, which is about one scoop, but I prefer to measure using actual measuring spoons. I don’t recommend a chocolate protein powder, as flavors vary widely, or whey protein powder, which makes for a dry cake.
- Besti Monk Fruit Allulose Blend – The best sugar substitute for a healthier protein powder mug cake recipe! This one tastes and bakes like sugar, with no calories or added net carbs, but most importantly, it locks in moisture so the end result isn’t dry. If you want to use a different sweetener, you can check these sweetener conversions, but know that most other sugar alternatives won’t make such a moist mug cake.
- Wholesome Yum Almond Flour – With a fine grind, this flour helps the mug cake “bake” up with a fine crumb, like a real chocolate cake. Avoid substituting with coconut flour (the cake will get far too dry) or almond meal (the texture will be coarse and gritty). For those with nut allergies, sunflower seed flour may work as a replacement.
- Butter – I prefer grass-fed butter, but any unsalted kind works. Coconut oil or ghee will also work for dairy-free or paleo options, respectively.
- Vanilla Extract – Use a high-quality brand if you can.
- Cocoa Powder – Of course this adds rich chocolate flavor, but it also adds bulk. You can omit this for a vanilla protein mug cake, but you’ll want to add more almond flour to compensate. It would also be best to then add more vanilla extract and/or the seeds from a vanilla bean pod, like I do for my vanilla mug cake recipe.
- Baking Powder – Helps the cake rise and get bubbly. Be sure it’s fresh, and use the batter right away after mixing, so that the baking powder reacts properly. Don’t use baking soda, which is not the same.
- Egg – Use a whole, large egg. A flax egg may also work, but the texture may change slightly.

How To Make Mug Cake With Protein Powder
This section shows how to make cake in a mug with protein powder, including step-by-step photos and details about the technique, to help you visualize it. For full instructions, including amounts and temperatures, see the recipe card below.
- Prep wet ingredients. Melt butter in a mug or medium ramekin. (If you prefer, you can mix the batter in a bowl instead, then transfer to a mug or ramekin to cook.) Add vanilla extract.

- Add dry ingredients and egg. Stir in protein powder, sweetener, cocoa powder, almond flour, and baking powder.
- Add the egg. Crack the egg into the mug, whisk a little, then mix with the rest of the batter. Smooth the top if needed.

- Microwave. Cook until an inserted toothpick removes cleanly.

Topping Ideas
You don’t have to top your cake with anything, but these make delicious additions:
- Sugar-Free Chocolate Chips – They’ll soften and get a little melty if you sprinkle them on top while the cake is fresh and hot.
- Sugar-Free Whipped Cream – You can make it with or without sweetener.
- Keto Caramel Sauce – Drizzle on top!
- Fruit – Many fruits are not low carb, but choose from the list of keto fruit here. I topped my cake with fresh strawberries.
- Nut Butter – Drizzle on some almond butter, which is already runny, or heat some peanut butter with a little coconut oil to thin it out before drizzling. Nut butter from any kind of keto nuts will work in the same way.
Frequently Asked Questions
I’m answering the most common questions below, but leave me a comment if you don’t see yours listed!
Are protein mug cakes healthy?
Protein cakes can be healthy, but beware of added sugar and gluten in the ingredients list (or the protein powder itself). This mug cake is healthier than most, since it uses a clean, neutral source of protein and cuts out white flour and sugar.
How to make protein mug cake moist?
There are several ways to keep a mug cake more moist:
- Use the right protein powder – A collagen rich protein powder with a finer grind will be less likely to dry out.
- Add enough high-fat ingredients – Use ingredients like butter, nut flours, and egg yolks to add moisture to the cake batter.
- Avoid overcooking the cake – The cake will easily dry out if microwaved for too long.
Why is my mug cake rubbery?
Mug cakes turn rubbery from overcooking. Start with the minimum cook time and add more time as needed to keep it from taking on a rubbery texture.
What size mug should I use?
I used an 8-ounce mug because I wanted the cake to rise over the top, but know that this does run some risk of the batter boiling over occasionally. Use at least a 12-ounce mug (which is the standard size anyway) if you don’t want to deal with this issue.
Can I make it without a microwave?
Yes! Instead of making a mug cake, pour the batter into a large ramekin and bake for 10-15 minutes, until an inserted toothpick comes out clean.
Storage Instructions
- Store: If you don’t finish chocolate protein mug cake in one sitting, cover and refrigerate it for up to 3 days.
- Freeze: Wrap tightly and freeze for up to 2 months. Thaw in the refrigerator before serving.

More Healthy Protein Recipes
Add more easy grass-fed protein to your snacks and meals with these easy recipes!
Homemade Protein Mug Cake Recipe
Chocolate Protein Mug Cake Recipe
This 5-minute chocolate protein mug cake recipe comes out moist, rich, and chocolaty — all with 36 grams of protein and 2 grams net carbs.
Recipe Video
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Ingredients
Tap underlined ingredients to see where to get them. Please turn Safari reader mode OFF to view ingredients.
Instructions
Tap on the times in the instructions below to start a kitchen timer while you cook.
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Melt the butter in a mug by heating for about 30 seconds in the microwave.
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Stir in the vanilla extract.
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Stir in Besti, protein powder, cocoa powder, almond flour, baking powder, and egg. Mix well, then smooth the top.
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Microwave for 60-75 seconds, until an inserted toothpick comes out clean, but the cake is still moist. (Alternatively, if you don't want to use the microwave, bake in the oven for 10-15 minutes at 350 degrees F.)
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If desired, top with chocolate chips and sugar-free whipped cream. (If you want the chocolate chips melty, you can microwave the cake for another 5-10 seconds before adding whipped cream.)
Last Step: Leave A Rating!
Share your recipe picture by tagging @wholesomeyum and hashtag it #wholesomeyum on Instagram, or in our free low carb support group, too – I’d love to see it!
Recipe Notes
Serving size: 1 mug cake
Nutrition facts are provided as a courtesy. Have questions about calculations or why you got a different result? Please see our nutrition policy.
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21 Comments
Eldar
0Hello, Made 1 cup (metric). I used iso100 protein powder. Lakanto power sugar. 50 sec. Came out dried like the desert… Didn’t miss one thing… What is the problem?
Maya | Wholesome Yum
0Hi Eldar, Most likely the problem was the sweetener used. Lakanto is drying, whereas Besti used in this recipe locks in moisture.
Kerrianne Hancock
0Hello Maya, I’m a newbie here !! I’m in Australia and unsure if I’m able to purchase the bone broth powder for this mug cake. Is there a substitute please? Many thanks in advance.
Maya | Wholesome Yum
0Hi Kerrianne, I’m not sure if the protein powder I used is available in Australia, you can check on their website. Another protein powder might work, but I haven’t tried it to confirm.
Sandra Pollock
0Can the protein powder be left out of the recipe?
Maya | Wholesome Yum
0Hi Sandra, Not this one but I do have a regular chocolate mug cake you can make.
Allison C.
0Recommended brand is sold out. Does anybody have a recommendation on other brands that have a clean taste? Thanks.
Wholesome Yum D
0Hi Allison, The Paleovalley Bone Broth is now back in stock!
Amy L Huntley
0Love that this dessert is made in a mug. So sweet and full of yummy flavor.
Faye Roner
0My favorite mug cake! Love this recipe!
tina
0This is perfect when you are craving a little cake, but dont want to make a whole cake! Thank you for sharing this recipe!
Ashley
0This recipe was exactly what I needed during the holidays! A special sweet treat that is much healthier than all of the other baking going around. Rich and chocolatey!
Amy L Huntley
0This is rich and delicious. So simple to make too! I love that it is made in a mug. So fun!
Andrea
0This is one of my favorite go to mug recipes! So delicious!
Scarlet
0Fun, easy and delish. This protein mug cake was fab!
Bernice
0These mug cakes are way too easy, delicious, and convenient!!
Kristyn
0I will be making this for myself weekly!! It’s the perfect individual size & so gooey!
Kim
0This tasted much better than I expected because I’m not a fan of protein powders, but this recipe cut my sweet tooth needs and was easy to make. Thank you.
Paula
0This was perfect when I just wanted a small dessert.
Taylor
0Whenever I get a sweet craving, this is the first recipe I reach for! It’s so moist and has the perfect amount of chocolate flavor. I just love it!
Toni
0I speriously enjoyed this!! Perfect for my cravings!!