The best microwave protein powder mug cake recipe that’s vegan, eggless, and made with oat flour. It’s the perfect 1-minute healthy and gluten-free breakfast, snack, or dessert!
The best microwave protein powder mug cake recipe
I love high-protein recipes! Some of my favorites are these mini protein cheesecakes (ranked #1 on Google), these protein baked oats, and this high-protein edible cookie dough. But, I have to say, this 1-minute protein mug cake is about to change everything – it’s easy to make, so tasty, and has 24 grams of protein.
This protein mug cake recipe is made with vanilla protein powder, oat flour, milk, coconut sugar, and a few other ingredients. There are NO eggs, NO oils, and NO butter in this healthy and vegan mug cake recipe. So everyone will love it.
I promise you cannot tell this high-protein mug cake is vegan. It takes like a chocolate chip muffin and has the same fluffy and moist texture as a vanilla cake.
My friends are obsessed with this easy recipe. I get daily texts and pictures of this mug cake. One of the best parts about this recipe is that you can customize it to your liking – I left over ten flavor variation below!
Why you’ll love this vegan recipe:
- This mug cake recipe has 24g of protein.
- It tastes like a chocolate chip muffin.
- Made with oat flour and protein powder.
- The mug cake is moist and fluffy.
- No eggs are needed.
- No oil or butter!
- You can’t tell it’s healthy.
- It’s vegan, dairy-free, and gluten-free.
- A healthy breakfast, snack, and dessert.
- Use store-bought or homemade oat flour.
- Use vanilla or your favorite flavor of protein powder.
- Try these protein baked oats or these mini protein cheesecakes next!
The taste and texture
This single-serve high protein mug cake taste like a mix between cake and a chocolate chip muffin. The primary flavors come from the vanilla protein powder and chocolate chips. However, you can also add peanut butter, cinnamon or use a flavored protein powder if you want.
Once microwaved, the mug cake is incredibly moist, soft, and fluffy. It is NOT gummy, dry, or dense. It has a soft crumb and a similar texture to a vanilla cake.
Ingredients needed & substitutions
This protein powder mug cake calls for six simple and healthy ingredients. You need oat flour, protein powder, coconut sugar, your favorite milk, and a few other ingredients. The best part is that you don’t need eggs, oil, or butter! Here is a list of everything you need so you are prepared:
- Oat Flour: You can use store-bought or homemade oat flour for this high-protein mug cake. I love Bob’s Red Mill. Do not substitute the oat flour with almond flour or coconut flour!
- Protein Powder: You can use whey or pea protein powder for this vegan mug cake. I love Garden of Life’s vanilla protein powder; however, feel free to use snickerdoodle, pumpkin, cookies and cream, your favorite flavor.
- Baking Powder: This is NOT the same as baking soda. This helps the mug cake rise and get super fluffy without eggs.
- Coconut Sugar: You only need 1 tablespoon to sweeten this mug cake. Coconut sugar makes this recipe refined sugar-free. In this recipe, you can substitute coconut sugar with light brown sugar or white sugar.
- Milk: This healthy mug cake recipe is so customizable that you can use any type of milk you want. I love oat milk, but almond, cashew, and cow’s milk work too!
- Vanilla Extract: A dash goes a long way flavor-wise.
- Chocolate Chips: Optional, but I love adding mini chocolate chips to my protein mug cakes for sweetness and flavor. You can use any type you want, including vegan and suagr free.
Kitchen tools required
Here is a list of kitchen utensils you will need to make this easy protein powder mug cake recipe.
- 8-ounce ramekin or microwave-safe mug
- Spoon or fork
- Measuring Tools: 1/2 teaspoon, 1 Tablespoon, and 1/4 cup.
How to make a protein mug cake
This microwaved high-protein mug cake is not only healthy and vegan, but it is super easy to make in under 60 seconds. It is extra fluffy, moist, and soft. Here are detailed step-by-step instructions with pictures for visual reference so any level baker can make them. The full recipe and ingredient measurements are in the recipe card’s bottom of this page.
First, mix the oat flour, protein powder, coconut sugar, and baking powder in a microwave-safe ramekin or mug.
Then, add the milk and vanilla. Whisk until there are no clumps, and a smooth batter is formed.
After that, stir in chocolate chips if desired and sprinkle extra on top.
Finally, microwave on high for 60 – 75 seconds. Every microwave is different, so I always check mine at the 50-second mark. If they look underdone or a little liquidy, cook in 10-second intervals until done.
Serve immediately and enjoy!
Expert tips for the perfect protein mug cake
- Spoon & level your oat flour. If you scoop it directly out of the bag, you will add too much flour, which will dry the mug cake. Avoid this by spooning and leveling your flour.
- Check the mug cake at 50 seconds. Every microwave is different, so I check mine at the 50-second mark to see how they cook. If the mug cake looks underdone or a little liquidy, cook in 10-second intervals until done.
- Don’t overbake. If you cook the mug cake in the microwave for too long, the cake will be rubbery or dry.
- Enjoy immediately. Protein mug cakes are best enjoyed within 5 minutes of making them.
- Use good quality protein powder. Not all protein powders are the same. I highly recommend this brand, for the perfect mug cake. If you use a poor-quality protein powder, your mug cake might be rubbery.
- Use homemade oat flour if needed. I always recommend Bob’s Red Mill oat flour, but you can also make homemade oat flour with rolled oats and a blender. Simply add around 2/3 cup of old fashion rolled oats or quick oats to a high-speed blender and blend on high for 30 – 90 seconds until it resembles a flour-like consistency. There shouldn’t be any oat grains left; make sure to blend it completely so it’s soft and smooth. Then measure out what the recipe calls for by spooning into a measuring cup and leveling it with the back of a knife.
How to make homemade oat flour:
Making homemade oat flour is so easy! I like to make a large batch and save the rest for future recipes.
Simply add around 3 – 4 cups of old fashion rolled oats or quick oats to a high-speed blender and blend on high for 30 – 90 seconds until it resembles a flour-like consistency. There shouldn’t be any oat grains left; make sure to blend it completely so it’s soft and smooth. Then measure out what the recipe calls for by spooning into a measuring cup and leveling it with the back of a knife.
Protein mug cake flavor variations & mix-ins
Here are my favorite flavor variations and mix-in ideas for this healthy and vegan high-protein mug cake recipe! This recipe is so customizable it’s crazy.
- Snickerdoodle: Instead of vanilla protein powder, use snickerdoodle flavored protein powder.
- Peanut butter: add 1 tablespoon to the batter (make sure to whisk it until combined) or drizzle some on top after for flavor and healthy fats.
- M&Ms: instead of chocolate chips, add 2 tablespoons of mini M&Ms to the batter before microwaving.
- Almond butter: add 1 tablespoon to the batter (make sure to whisk it until combined) or drizzle some on top after for flavor and healthy fats.
- Blueberries: instead of chocolate chips, add 2 tablespoons of blueberries to the batter before microwaving.
- Apple pie: add 2 tablespoons of cut-up apple pieces to the batter before baking in the microwave.
- Carrot cake: add 3 tbsp of shredded carrots to the batter and add 1 tsp of cinnamon.
- Pumpkin pie: add 1 teaspoon of pumpkin pie spice or use pumpkin spice protein powder.
- Rainbow or chocolate sprinkles: add 1 – 2 tablespoons to the batter.
- Coconut cake: add 1 – 2 tablespoons of unsweetened shredded coconut to the batter.
- Walnuts, pecans, or almond slivers: add 2 tablespoons to the batter.
Frequently Asked Questions
Is this mug cake healthy?
Yes, the protein mug cake is healthy for many reasons; here are a few: (1) it is refined sugar-free and sweetened with coconut sugar, (2) this mug cake is gluten-free and made with oat flour, (3) there is NO butter, NO oil, and NO dairy, (4) the mug cake is vegan since there are no eggs, and (5) it has 24 grams of protein.
How many grams of protein are in this mug cake?
There are 24 grams of protein in this single-serve protein mug cake.
Why did my mug cake not rise?
Make sure your baking powder is not expired! If your baking powder expires or is open for over six months, your oat flour mug cake will sink.
Why is my mug cake rubbery?
Make sure you are measuring the wet and dry ingredients correctly. Spoon and level the oat flour, and make sure you are not adding too much milk. If your batter is too wet, the protein mug cake will not rise and will be rubbery.
Can I use chocolate protein powder?
Yes! You can use chocolate or any other flavor of protein powder.
Can I use vegan pea protein powder?
You can use whey or vegan pea protein powder for this healthy mug cake recipe.
Is this protein mug cake low-calorie?
This protein mug cake has 286 calories, so yes, this recipe is low-calorie.
Is this mug cake vegan?
Yes, this protein mug cake is 100% vegan since there is no dairy, eggs, or butter in this recipe.
Can I use homemade oat flour?
You can also make homemade oat flour with rolled oats and a blender. Simply add around 2/3 cup of old fashion rolled oats or quick oats to a high-speed blender and blend on high for 30 – 90 seconds until it resembles a flour-like consistency. There shouldn’t be any oat grains left; make sure to blend it completely so it’s soft and smooth. Then measure out what the recipe calls for by spooning into a measuring cup and leveling it with the back of a knife.
Is this recipe gluten-free?
This recipe is 100% gluten-free.
Can I bake this protein mug cake instead?
Microwaving mug cakes takes 60 seconds; however, you can also bake them if you want. Preheat the oven to 350°F and bake for 18 – 22 minutes, until golden and fluffy.
How long do mug cakes take to cook in the microwave?
This mug cake recipe takes 60 seconds to cook in a microwave.
How to store and reheat:
Protein mug cakes are best enjoyed warmly directly after microwaving. However, you can store leftovers by covering the mug or baking dish with foil and storing it in the refrigerator for up to 4 days. You can reheat it in the microwave for 30 – 45 seconds.
If you love this recipe, try these next!
- Microwave Baked Oats
- Protein Chocolate Chip Baked Oats
- Mini Protein Cheesecakes
- Protein Acai Bowl
- Protein Overnight Oats
Did you make this recipe?
If you make this recipe, be sure to comment and rate it down below. Also, don’t forget to tag me @healthfulblondie on Instagram and use the hashtag #healthfulblondie so I can see your delicious creation and share it with my followers!
Best Protein Mug Cake
- In a microwave-safe ramekin or mug, mix the oat flour, protein powder, coconut sugar, and baking powder.
- Add in the milk and vanilla. Whisk until there are no clumps, and a smooth batter is formed.
- Stir in chocolate chips if desired and sprinkle extra on top.
- Microwave on high for 60 – 75 seconds. Every microwave is different, so I always check mine at the 50-second mark. If they look underdone or a little liquidy, cook in 10-second intervals until done.
- Serve immediately; enjoy!
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