Keto Cinnamon Roll Mug Cake Recipe

This keto cinnamon roll mug cake came from one of those late-night cravings where I wanted something warm, sweet, and comforting but didn’t want to ruin a whole day of low-carb eating. I tried a few mug cake versions early on that were either rubbery, eggy, or tasted way too much like almond flour. After a handful of tweaks—especially with the balance of moisture and sweetener—I finally landed on a version that genuinely satisfies the cinnamon roll craving without feeling like a compromise.

It’s soft, fluffy, packed with cinnamon flavor, and finished with a simple keto-friendly glaze. Best of all, it’s ready in minutes and doesn’t require turning on the oven.

Why This Keto Cinnamon Roll Mug Cake Works

• Truly low-carb and keto-friendly
• Single-serving with no leftovers
• Soft, cake-like texture instead of spongy
• Warm cinnamon roll flavor in minutes
• No yeast, no rising time, no mess

This recipe is perfect when you want something sweet now without baking an entire batch.

Ingredients

Mug Cake Base

• 3 tablespoons almond flour
• ½ tablespoon coconut flour
• ½ teaspoon baking powder
• Pinch of salt
• 1 tablespoon keto sweetener (erythritol, monk fruit, or blend)
• 1 tablespoon melted butter or coconut oil
• 1 large egg
• 1 tablespoon unsweetened almond milk
• ½ teaspoon vanilla extract

Cinnamon Swirl

• 1 tablespoon softened butter
• 1 tablespoon keto brown sugar substitute
• ½ teaspoon ground cinnamon

Optional Keto Glaze

• 1 tablespoon cream cheese, softened
• 1 tablespoon heavy cream
• 1 tablespoon powdered keto sweetener
• Splash of vanilla

Preparation and Cooking Time

• Prep Time: 5 minutes
• Cook Time: 60–90 seconds
• Total Time: About 7 minutes
• Servings: 1

Important Tips Before You Start

These details make the difference between a fluffy mug cake and a dense one:

• Use a microwave-safe mug that holds at least 10–12 oz
• Measure flours accurately; too much coconut flour dries it out
• Don’t overcook—keto cakes firm up as they cool
• Let it rest for 1 minute before adding the glaze
• Stir gently to avoid a tough texture

Instructions

Step 1: Mix Dry Ingredients

In a microwave-safe mug, whisk together almond flour, coconut flour, baking powder, salt, and keto sweetener. Break up any lumps, especially from almond flour.

Step 2: Add Wet Ingredients

Add melted butter, egg, almond milk, and vanilla extract. Stir until the batter is smooth and fully combined. Scrape the sides and bottom of the mug to ensure even mixing.

Step 3: Make the Cinnamon Swirl

In a small bowl, mix softened butter, keto brown sugar substitute, and cinnamon until smooth.

Step 4: Create the Swirl

Drop small spoonfuls of the cinnamon mixture on top of the batter. Use a toothpick or knife to gently swirl it through the batter without fully mixing it in.

Step 5: Microwave

Microwave on high for 60 seconds. Check the center. If still slightly wet, microwave in 10–15 second intervals until just set. The top should look firm but soft.

Step 6: Rest

Let the mug cake sit for about 1 minute. This allows the texture to finish setting and prevents a gummy center.

Step 7: Add the Glaze

Mix glaze ingredients until smooth and drizzle over the warm mug cake.

Texture and Flavor Variations

Extra Gooey Version

Underbake slightly and add extra cinnamon swirl in the center.

Dairy-Free Option

Use coconut oil instead of butter and coconut cream instead of heavy cream.

Nut-Free Version

Use sunflower seed flour instead of almond flour (expect a slightly darker color).

Chocolate Cinnamon Mug Cake

Add ½ teaspoon unsweetened cocoa powder to the batter for a chocolate twist.

Protein Boost

Add ½ tablespoon vanilla keto protein powder and an extra splash of almond milk.

@miss_lizee

Serving Suggestions

Even though it’s a single serving, there are fun ways to enjoy it:

• Eat straight from the mug while warm
• Top with chopped pecans or walnuts
• Add a spoonful of keto vanilla ice cream
• Sprinkle with extra cinnamon
• Pair with coffee or tea for a cozy treat

This mug cake is best enjoyed immediately while warm.

Storage and Make-Ahead Notes

Storage

This recipe is designed for a single serving and doesn’t store well once cooked.

Make-Ahead Tip

You can pre-mix the dry ingredients and store them in a small jar for quick use later.

Reheating

If needed, reheat gently for 10–15 seconds in the microwave.

Nutritional Highlights

• Low in net carbs
• High in healthy fats
• Gluten-free and grain-free
• No refined sugar
• Satisfying without spiking blood sugar

Exact macros will vary based on ingredients used, especially sweeteners.

FAQs

Why is my mug cake rubbery?

Overcooking is the most common reason. Keto mug cakes need less time than you think.

Can I bake this instead of microwaving?

Yes. Bake at 350°F (175°C) for about 12–15 minutes in an oven-safe ramekin.

Can I skip the egg?

The egg is essential for structure in this recipe. Egg-free versions require major adjustments.

What sweetener works best?

Powdered erythritol or monk fruit blends work best for smooth texture.

Can I double the recipe?

Not in one mug. If doubling, use two separate mugs to ensure even cooking.

Why does my cake taste eggy?

Overcooking or not enough flavoring can cause this. Vanilla and cinnamon help balance it.

Common Mistakes to Avoid

• Using too much coconut flour
• Microwaving for too long
• Skipping the rest time
• Using a small mug that overflows
• Not mixing the batter thoroughly

Final Thoughts

This keto cinnamon roll mug cake has saved me from countless cravings and impulse baking sessions. It delivers that warm, cozy cinnamon roll feeling in minutes, without flour, sugar, or guilt. Once you make it a couple of times, you’ll start adjusting the sweetness, swirl amount, and glaze to match your taste perfectly.

When you want comfort food without breaking keto, this mug cake is proof that quick and low-carb can still feel indulgent.