Low Carb Chocolate Chip Mug Cake: The 90-Second Fix (So Moist)

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Forget dry, rubbery microwave attempts; this chocolate chip mug cake changes the game with a crumb so tender it feels like a bakery slice. It comes together instantly, delivering warm, melting pockets of chocolate that vanish on your tongue.

Low Carb Chocolate Chip Mug Cake - a fluffy single-serve vanilla cake in a mug topped with melting sugar-free chocolate chips

Why This Recipe Works

  • Instant Gratification: There is no preheating or waiting for the oven; you go from mixing bowl to warm satisfaction in under five minutes.
  • Melt-in-Your-Mouth Texture: The combination of avocado oil and fine almond flour ensures the crumb stays soft and moist, never spongy or tough.
  • Perfect Balance: A hint of almond extract elevates the vanilla base, making the chocolate taste even richer and more decadent.

The Lifestyle Fit

I know how hard it is to find a quick dessert that aligns with a low-carb lifestyle without requiring a sink full of dirty dishes. This recipe is a staple in my kitchen because it uses high-quality fats like avocado oil and almond flour.

It provides a satisfying end to the day. The healthy fats keep me feeling full, and the single-serving portion makes it easy to enjoy a sweet treat responsibly. It pairs beautifully with smart sugar alternatives so you get the sweetness without the sugar.

How to Make It

Whisk the Wet Ingredients:
Grab your favorite tall coffee mug (10-12 oz). Whisk the egg, oil, and extracts directly in the mug until the mixture is completely smooth.

Add the Dry Ingredients:
Stir in the almond flour, sweetener, flaxseed, baking powder, and salt. Make sure you scrape the bottom corners with a fork to incorporate all the flour.

The Chocolate Fold:
Gently fold in most of the chocolate chips. Let the batter sit for a minute—this little pause lets the fiber absorb moisture for a better texture.

Microwave & Enjoy:
Cook for about 60–90 seconds depending on your wattage. Top with the remaining chocolate chips while it's hot so they become glossy and spreadable.

fluffy vanilla cake in a dark grey mug, generously topped with sugar-free chocolate chips and a sprinkle of sweetener, with a large bite revealing the tender

Expert Tips for Success

  • Watch the Wattage: Microwaves vary wildly. Start with 55 seconds; if it looks wet, add 10-second intervals. You want the center to look just set, not dry.
  • The Cooling Rule: It is tempting to dig in immediately, but letting it cool for one minute allows the crumb structure to firm up, preventing it from crumbling apart.
  • Serving Suggestion: This is delicious on its own, but sometimes I serve it alongside one of these refreshing drinks for a complete evening treat.
  • Need a Batch? If you have family members eyeing your mug, you might want to bake a full tray of soft-baked cookies instead so everyone gets their share.

Common Questions

Can I use coconut flour instead of almond flour?
No, I wouldn't recommend a direct swap. Coconut flour absorbs much more liquid and will make the cake dry and crumbly without adjusting the eggs and liquid significantly.

Can I bake this in an oven?
Yes! If you don't use a microwave, pour the batter into a ramekin and bake at 350°F (175°C) for about 12–15 minutes until a toothpick comes out clean.

Low Carb Chocolate Chip Mug Cake - a warm, fluffy vanilla cake served in a dark grey ceramic mug, generously topped with sugar-free chocolate chips and a sprinkle of granular sweetener, with a large bite revealing the tender, tender crumb inside

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Vanilla-Almond Chocolate Chip Mug Cake

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  • Prep Time: 4 minutes
  • Cook Time: 2 minutes
  • Total Time: 6 minutes
  • Yield: 1
  • Category: Dessert, Mug Cake
  • Cuisine: American

Description

A quick, low-carb mug cake with a soft, moist crumb, rich vanilla-almond notes, and decadent melted chocolate chips.


Ingredients

Mug Cake Batter

  • 1 large egg (room temperature)
  • 1 tablespoon avocado oil
  • 1/2 teaspoon vanilla extract
  • 1/8 teaspoon almond extract
  • 2 1/2 tablespoons fine almond flour
  • 1 tablespoon + 1 teaspoon granulated monk fruit/erythritol blend
  • 2 teaspoons ground flaxseed
  • 1/2 teaspoon baking powder
  • 1 pinch of salt

Mix-Ins


Instructions

  1. Select a tall, microwave-safe coffee mug (at least 10-12 oz capacity to prevent overflow). Add the egg, avocado oil, vanilla extract, and almond extract. Whisk thoroughly with a fork directly in the mug until smooth.
  2. To the same mug, add the almond flour, granulated sweetener, ground flaxseed, baking powder, and salt. Stir with the fork until just combined, ensuring no dry pockets remain at the bottom.
  3. Gently fold in 1 tablespoon of the sugar-free chocolate chips.
  4. Let the batter rest for 60 seconds. This allows the flax and almond flour to hydrate, improving the cake's final texture.

Microwave according to your microwave's power.

  1. 1000W: 55–70 seconds
  2. 800–900W: 70–90 seconds
  3. 700W: 90–110 seconds The cake is done when the top is set and springs back lightly, or when a toothpick inserted into the center comes out with moist crumbs.
  4. Carefully remove the hot mug. Sprinkle the remaining 1 teaspoon of chocolate chips on top (they will melt from the residual heat). Let the cake cool for at least one minute before enjoying.

Notes

Nutrition Information (Per Serving – Entire Mug)

Calories: 397 kcal Total Fat: 36.5 g Saturated Fat: 6.5 g Sodium: 392 mg Total Carbohydrates: 12.6 g Dietary Fiber: 6.5 g Net Carbohydrates: 6.1 g Total Sugars: 1.3 g Protein: 12.2 g

Disclaimer: Values are estimates based on standard USDA data; actuals vary by brands and methods. Net Carbs = Total Carbs – Fiber.


Nutrition

  • Calories: 397

I hope this mug cake becomes your go-to whenever you need a quick moment of sweetness. It’s a simple way to enjoy warm, home-baked flavor without the hassle.

Disclaimer: I’m just a mom and food enthusiast sharing what works for my kitchen, not a nutritionist. Always listen to your own body and consult your doctor when making dietary changes!

Last updated: February 11, 2026
Picture of Laura Santiago

Laura Santiago

I’m Laura Santiago—a recipe developer, wellness strategist, and busy mom of three. I combine my background in research with a love for great food to create nourishing, family-friendly meals. My mission is simple: to prove that you never have to sacrifice flavor to live a healthy life.

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