3-Ingredient Keto Mug Cake (Flourless)

This easy flourless 3-Ingredients Keto Mug Cake recipe is the best quick fix to any sweet craving in no time with only 3 basic pantry ingredients. Plus, this mug cake contains only 6.5 grams of net carbs per serving, and it’s naturally gluten-free and dairy-free.

Table of contents

+ View More- View Less

Ingredients and Substitutions

All you need to make this simple flourless keto mug cake recipe are:

• Nut butter – I used natural peanut butter, but natural almond butter works as well.
• Large egg at room temperature.
• Stevia-sweetened cocoa powder – I used keto drinking chocolate mix made of unsweetened cocoa powder and erythritol. Some popular brands I love are Lakanto or Avalanche.

Note that I use unsweetened cocoa powder in this recipe. The keto mug cake is unsweetened because natural peanut butter has no sweetener added. So to make the mug cake sweet, you will need a fourth ingredient, like 1 1/2 tablespoon erythritol or stevia drops.

How To Make A 3-Ingredients Flourless Keto Mug Cake

This 3-ingredient Keto Mug Cake is a single-serving cake, easy, quick, and baked in the microwave in 90 seconds.

1. First, make sure you stir very well the peanut butter in its jar. This recombines the oily layer that often shows on top of fresh jars and dries up the spread under it.
2. Next, beat the egg and peanut butter together.
3. Make sure both ingredients are at room temperature and that your spread is creamy, drippy not dry in its jar. If you are using a dry spread, the mug cake will be crumbly and not good.
4. Finally, stir in cocoa powder and a touch of baking powder only if you prefer a fluffy keto mug cake. I personally like the easy 3-ingredient version. It tastes like a brownie. The batter of this keto mug cake should be relatively liquid, not thick or dry.
5. Finally, transfer the batter into an 8-once coffee mug and microwave for 60-90 seconds.
6. Start microwaving for 60 seconds at 900W, then add 10 seconds burst until cake is set on top.
7. Cool the mug cake down for 30 seconds in the mug before eating.

Serving Suggestions

Serve your keto mug cake topped with:

• Sugar-free keto chocolate chips
• Drizzle natural peanut butter
• Unsweetened whipped cream

Storage Instructions

You can’t store a baked keto mug cake simply because microwave baking dries out food super fast. As a result, cakes are good to eat for only 30 minutes after baking. After that time, their texture becomes crumbly and extra dry.

However, it’s a great keto-friendly recipe to make ahead. Simply whisk egg, spread, and almond flour the day before. Store in your mug, wrap top with plastic wrap, and pop in the fridge. The next day, microwave as recommended in the recipe.

Taste and texture

This 3-ingredient mug cake tastes like a brownie-like chocolate cake. I love to top it with sugar-free dark chocolate chips to add an extra smooth melted chocolate texture to the crumb. Depending on the cooking time you apply, the cake can be moister or dryer.

I always recommend microwaving the mug cake for 60 seconds and adding 10 seconds burst until the texture looks like your favorite keto cake recipe.

Allergy Swaps

If you can’t find some of the ingredients in this recipe in your grocery store, you can use another simple swap like:

• Natural peanut butter swaps – drippy Almond butter, sunflower seed butter, cashew butter.
• Stevia sweetened cocoa powder – replace with 1/2 tablespoon of unsweetened cocoa powder (or cacao powder) combined with 1 to 1 1/2 tablespoon erythritol.

More Keto Mug Cake Recipes

I love to create keto mug cake recipes to fix my sweet tooth on my keto diet and minimize carbs for breakfast! Below I listed my favorite other keto low-carb mug cake recipes for you to try.

Keto Snickerdoodle Mug Cake

Keto Mug Cake Recipe

Almond Flour Mug Cake

Keto Peanut Butter Mug Cake

Did You Like This Recipe?

Leave a comment below or head to our Facebook page for tips, our Instagram page for inspiration, our Pinterest for saving recipes, and Flipboard to get all the new ones!

3-Ingredient Keto Mug Cake

6.5gNet Carbs

A delicious fudgy chocolate Keto Mug Cake made with 3 simple ingredients.

Author: Carine Claudepierre

Prep: 2 minutes mins

Cook: 2 minutes mins

Total: 4 minutes mins

Yield: 1 mug cake

Serving Size: 1 mug cake

4.62 from 18 votes

Pin Share Save Saved! Review Print

Cook ModePrevent your screen from going dark

Ingredients

US Customary – Metric

• ▢ 2 tablespoons Natural Peanut Butter
• ▢ 1 large Egg
• ▢ 2 tablespoons Sugar-free Drinking Chocolate Powder – Sweetened with Monk Fruit or 1/2 tablespoons unsweetened cocoa powder + 1 1/2 tablespoons erythritol

Optional – for a fluffier mug cake

• ▢ ½ teaspoon Baking Powder

Instructions

• In a small bowl, whisk egg and natural peanut butter. Beat until it is consistent and it looks like melted peanut butter. You shouldn't see egg white pieces.
• Stir in sugar-free drinking chocolate powder and a pinch of baking powder for a fluffier cake, or, if you used unsweetened cocoa powder, use 1/2 tablespoons cocoa + 1 1/2 tablespoons erythritol.
• Transfer the batter into a tall 8-ounce coffee mug.
• Microwave for 90 seconds at 900W until the cake is set.
• Serve with a dollop of unsweetened whipped cream or sugar-free chocolate chips.

Tools

Getting Started What Is Keto? Macro Calculator Sweetener Converter Intermittent Fasting    Keto    Fruits Keto Vegetables Keto Flours Fighting Keto Flu Healthy Sweeteners

Want My Kitchen Equipment?

Measuring Cups Set

Mixing Bowls

Whisk

Tried this recipe?Mention @sweetashoneyrecipes

NutritionServing Size: 1 mug cake

Yield: 1 mug cake

Nutrition

Serving: 1 mug cakeCalories: 272.1 kcal (14%)Carbohydrates: 10.1 g (3%)Fiber: 3.6 g (15%)Net Carbs: 6.5 gProtein: 15.3 g (31%)Fat: 21.6 g (33%)Saturated Fat: 5.3 g (33%)Polyunsaturated Fat: 5.5 gMonounsaturated Fat: 9.8 gTrans Fat: 0.1 gCholesterol: 186 mg (62%)Sodium: 430.9 mg (19%)Potassium: 353.3 mg (10%)Sugar: 3.2 g (4%)Vitamin A: 270 IU (5%)Vitamin B12: 0.5 µg (8%)Vitamin D: 1 µg (7%)Calcium: 165.7 mg (17%)Iron: 2.4 mg (13%)Magnesium: 80.8 mg (20%)Zinc: 1.9 mg (13%)