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Home » Recipes » Mug Cakes

Protein Microwave Lava Cake – Sugar Free, Low Fat

Published: Jul 1, 2022 · Last Modified: Feb 23, 2025 by Haylee Jane Monteiro · This post may contain affiliate links

The perfect Protein Microwave Lava Cake with the gooey center, but sugar free and low fat! Healthy microwave molten lava cake uses protein powder for sweetness and has no sugar or butter.

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The perfect Protein Microwave Lava Cake with the gooey center, but sugar free and low fat! Healthy microwave molten lava cake uses protein powder for sweetness and has no sugar or butter.

That gooey center in this microwave lava cake was just spot on! Just what you want from an indulgent dessert recipe, but without all the sugar and fat.

Really clean ingredients in this microwave protein chocolate lava cake too!

Ingredients for Protein Microwave Lava Cake

This single serve protein microwave lava cake is made with a few simple and healthy ingredients, and has no sugar or butter or oil! 

  • Whole Wheat Pastry Flour – or a regular all purpose flour
  • Chocolate Protein Powder needed for high protein lava cake and also replaces the ‘sugar’. I used Chocolate Milkshake protein powder from Quest Nutrition.
    HTLT Supps is another great option.
  • Unsweetened Cocoa Powder 
  • A bit of Greek Yogurt to add moisture since there’s no butter or oil in here
  • Egg Whites for extra protein
  • Unsweetened Almond Milk
  • A bit of Vanilla Extract
  • Baking Powder

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

And then for some of the center of this Microwave Lava Mug Cake:

  • Sugar free Chocolate Bar or Chocolate Chips to make this a Samoa cookie bar with no added sugar. I use the ones from Lakanto here (HAYLSKITCHEN for a discount here too). Another option is Lily’s Bar or Chocolate Chips.
The perfect Protein Microwave Lava Cake with the gooey center, but sugar free and low fat! Healthy microwave molten lava cake uses protein powder for sweetness and has no sugar or butter.

Tips to make Molten Lava Cake with Protein Powder in the Microwave

This microwave molten lava cake using protein powder really is an easy one and made in a mug, but make sure you do all of this stuff to get is perfect.

  • Grease the mug! You want the lava cake to come off easily.
  • Don’t over-mix the batter!
    Make sure you gently fold the dry mix into the wet to combine them.
    If you over-mix it, the protein powder will make your protein lava 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 overcook. The top will should be soft slightly jiggly in the center (about half of it) and cooked all around.
    It will continue to cook when out, and you want the proper molten lava center.
  • Wait for the cake to cool a bit.
  • Run a knife along the side of the ramekin to loosen it so it comes off smoothly when you flip it on a plate.
The perfect Protein Microwave Lava Cake with the gooey center, but sugar free and low fat! Healthy microwave molten lava cake uses protein powder for sweetness and has no sugar or butter.

Alternates for this Healthy Microwave Lava Cake Recipe

I recommend making this a healthy microwave lava cake with the protein powder and other ingredients listed since it gives the best results.

If you need other options for the flours and such, here’s some alternatives for a healthy lava cake for one:

  • Whole Wheat Pastry Flour: All purpose flour, 1:1 gluten free baking flour or Almond Flour in the same amount by weight not cups.
    Update: A reader has confirmed that Almond flour works here.
  • Chocolate Protein Powder: Use Vanilla; You might need another teaspoon of Cocoa powder though.
  • Egg Whites: 2 tablespoon aquafaba (chickpea liquid). I haven’t given this a try yet though.
  • Greek Yogurt: Coconut Yogurt, Pumpkin Puree, Mashed Banana
  • Almond Milk: Any other milk

A Vegan Microwave Molten Lava Cake 

This microwave molten lava cake recipe has no butter or milk and can easily be made Vegan too.

For the perfect Vegan protein microwave lava cake recipe, make sure you use a plant based protein powder, aquafaba and coconut yogurt.

More Microwave-friendly Protein Powder Dessert Recipes:

  • Healthy Single Serve Peach Crisp in a Microwave
  • Chocolate Chip Pancake Mug Cake
  • Double Chocolate Protein Cookie in a Microwave

More Protein Lava Cake Recipes to Try:

  • Air Fryer Protein Lava Cake
  • Protein Oreo Lava Cake
  • Best Protein Chocolate Lava Cake
  • Peanut Butter Protein Lava Cake
  • Protein Red Velvet Lava Cake
  • Protein Matcha Lava Cake

Protein Microwave Lava Cake – Sugar Free, Low Fat

5 from 6 votes
Print recipe Pin Recipe
Prep Time2 minutes mins
Cook Time1 minute min
Total Time3 minutes mins
Servings: 1 mug cake
Calories: 176kcal
Course: Dessert
Cuisine: American
The perfect Protein Microwave Lava Cake with the gooey center, but sugar free and low fat! Healthy microwave molten lava cake uses protein powder for sweetness and has no sugar or butter.

Ingredients

  • ¼ cup Chocolate Protein Powder, Whey-casein, 22g
  • 2 tablespoon Unsweetened Cocoa Powder, 10g
  • 1½ tablespoon Whole Wheat Pastry Flour, 11g, see post for subs
  • ¼ teaspoon Baking Powder
  • ¼ cup Unsweetened Almond Milk, 60ml
  • 1 tablespoon Greek Yogurt, 14g
  • 1 Egg White, 31g, 2 Tbsp
  • ¼ teaspoon Vanilla Extract

Filling:

  • ¼ oz Chocolate Piece, 7g, Optional, Sugar-free recommended below

Instructions

  • Lightly grease a microwave-safe mug.
  • In a bowl, whisk flour, chocolate protein powder, cocoa powder and baking powder.
  • Add almond milk, egg white, yogurt and vanilla, and stir until combined.
    Batter should be smooth.
    Taste batter and add sweetener if needed.
  • Pour half batter into mug, place chocolate piece, and pour remaining batter.
  • Microwave on high for 50 sec – 1 min.
    Center of top will be soft and slightly runny.
  • Let cool for a few minutes, invert onto plate and enjoy!

Notes

  • Taste the batter and see if you need some extra sweetener; I’d recommend stevia if needed.
  • Nutrition value is calculated using products recommended below.
  • See post for alternate ingredients, tips and storage options.
Product Recommendations:
  • Quest Nutrition Chocolate Whey-Casein Protein Powder
  • Lakanto Sugar-free Chocolate Bar
    • Use code HAYLSKITCHEN for 15% off your order
Nutrition:
  • Servings: 1 cake | Serving size: 1
  • Calories: 176kcal
  • Fat: 2.5g | Saturated fat: 0.3g
  • Carbohydrates: 17.6g | Fiber: 5.4g | Sugar: 0.8g
  • Protein: 24.4g

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Comments

  1. Christina says

    February 03, 2025 at 8:05 am

    5 stars
    Thank you for the amazing recipe, I used 40ml of milk because I only have whey protein and it turned out great!

    Reply
    • Haylee Jane Monteiro says

      February 07, 2025 at 3:58 pm

      You’re most welcome Christina! I’m so glad it turned out well with the Whey protein 🙂

      Can’t wait to see what recipe you try next!

      Reply
  2. Katy says

    November 03, 2023 at 7:36 am

    5 stars
    This was fantastic–fit my macros easily with a wonderful amount of protein, easy to make, and tasty! Thanks for the excellent recipe.

    Reply
    • Haylee Jane Monteiro says

      February 18, 2024 at 12:18 am

      Easy and tasty is what I was hoping for 🙂 Super glad you liked it.

      Reply
  3. Tiffany Marshall says

    March 13, 2023 at 3:30 pm

    I’m very hesitant about trying mug cakes but this was very good. Had all the ingredients on hand. Even topped mine with Halo ice cream

    Reply
    • Haylee Jane Monteiro says

      May 31, 2023 at 12:10 am

      YAYYY I’m so glad you gave this one a try Tiffany. Super easy and so good! Especially with the ice cream!

      Reply
  4. Nadia says

    July 14, 2022 at 11:44 am

    5 stars
    Loved how easy this was to make, and only required ingredients that were already in my cupboard. The lava was the best part. Definitely satisfied my sugar craving.

    Reply
    • Haylee Jane Monteiro says

      August 27, 2022 at 1:29 pm

      I couldn’t agree more! The simple ingredients and craving-satisfaction is what I go for. Enjoy!

      Reply
  5. Olivia.Shillinglaw says

    July 11, 2022 at 5:15 am

    5 stars
    This was sooooo good. My mum is very cautious of her protein that she has a day and her carbs and she loved this with a cup of tea. I also loved this because the texture was OUTSTANDING and loved this one so much. I give it a 5/5 and so does my mum. Thanks x

    Reply
    • Haylee Jane Monteiro says

      August 27, 2022 at 1:27 pm

      Oh you made my day Olivia! Mom-approved is an even better sign!

      Hope you both find more treats on here to try.

      Reply
  6. Jevay Aggarwal says

    July 07, 2022 at 10:38 am

    5 stars
    So here’s how this went. 5 mins to make, 30 secs to inhale 🙂 This is my new go to for quick, easy and obviously delicious mug cakes!!!

    Reply
    • Haylee Jane Monteiro says

      July 11, 2022 at 12:53 am

      YES YES YES!!

      This microwave lava cake really is a marvel. It’s actually my go-to quick-fix dessert as well!

      Reply
  7. Carlee says

    July 02, 2022 at 10:41 am

    5 stars
    This was super easy to make and it was delicious!!! Following the little tips and tricks definitely helped to perfect this on my own. I paired it with a protein ice cream and I can’t wait to have it for dessert again

    Reply
    • Haylee Jane Monteiro says

      July 11, 2022 at 12:55 am

      Omigosh Carlie! I’m so glad you actually used the tips and got this right!

      And with some protein ice cream? Genius! I need to get my hands on some of that,

      Reply

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Hi, I'm Haylee!

I use my passion for baking (and my sweet tooth) to create healthy, high protein, low fat and sugar free desserts and sweet treats that are actually delicious.

Come join me in Hayl's Kitchen and let's eat high protein, sweet and guilt free!

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