Keto Lemon Mug Cake – Quick, Easy & Gluten-Free Dessert

Looking for a keto-friendly dessert that’s light, citrusy, and ready in just minutes? This Keto Lemon Mug Cake is the perfect answer. Made with wholesome low-carb ingredients like coconut flour, almond meal, and Keystone Pantry Allulose, this fluffy single-serve treat satisfies your sweet tooth without spiking blood sugar. Plus, it’s naturally gluten-free and grain-free!

Why These Ingredients Make It Keto

Every ingredient in this mug cake is chosen with purpose to keep it low-carb, sugar-free, and keto-approved:

• Butter (1 ½ tbsp, melted) – Adds richness, moisture, and healthy fats essential for keto baking. Butter keeps the cake soft while boosting satiety.

• Egg (1 large) – Provides structure and helps the cake rise. Eggs are also a great source of protein and healthy fats, making them ideal for keto diets.

• Lemon Rind (1 tsp finely grated) – Infuses the cake with bright citrus flavor without adding carbs. Lemon zest intensifies the flavor more than juice alone.

• Coconut Flour (¼ cup) – A naturally gluten-free, high-fiber flour that absorbs liquid and keeps the cake fluffy. Coconut flour is extremely low in carbs compared to wheat flour.

• Ground Almonds (1 tbsp) – Adds texture and a nutty flavor, while contributing protein and heart-healthy fats. Almonds are a keto staple for baking.

• Keystone Pantry Allulose (2 tsp) – A rare natural sugar that tastes like sugar but has zero net carbs. Unlike artificial sweeteners, allulose caramelizes and bakes like real sugar—making it the perfect keto sweetener.

• Baking Powder (½ tsp) – Helps the mug cake rise, creating a soft and airy texture.

• Almond Milk (2 tbsp) – Adds moisture without extra carbs. Unsweetened almond milk is a keto-friendly alternative to dairy milk.

• Fresh Lemon Juice (1 tbsp) – Brightens the flavor and balances the richness of the butter and mascarpone.

• Mascarpone (for serving) – A creamy, high-fat Italian cheese that makes this dessert indulgent and satisfying. It’s naturally low in carbs and a perfect keto-friendly topping.

Step-by-Step Method

Step 1
Whisk together the melted butter, egg, and lemon rind in a small mixing bowl until smooth. Add the coconut flour, ground almonds, Keystone Pantry Allulose, baking powder, almond milk, and lemon juice. Stir until fully combined.

Step 2
Pour the batter into a 1-cup microwave-safe mug. Microwave on HIGH for 2 minutes, then let it rest for 30 seconds.

Step 3
Top with a dollop of mascarpone and a sprinkle of extra lemon zest (optional). Serve warm and enjoy!

Is This Recipe Gluten-Free?

✅ Yes! This Keto Lemon Mug Cake is completely gluten-free, since it uses coconut flour and almond flour instead of wheat flour. It’s also grain-free and suitable for both keto and low-carb lifestyles.

Nutrition Facts Panel (per serving, 1 mug cake with mascarpone)

• Calories: 255

• Total Fat: 21g

• Saturated Fat: 11g

• Cholesterol: 185mg

• Sodium: 140mg

• Total Carbohydrates: 9g

  • Dietary Fiber: 4g

  • Sugars: 1g

  • Net Carbs: 5g

• Protein: 8g

(Values are approximate and may vary by ingredient brand.)

Frequently Asked Questions (FAQ)

Q: Can I substitute almond flour for coconut flour?
A: No, coconut flour absorbs much more liquid than almond flour. If you swap, you’ll need at least 3x more almond flour and may need to adjust the liquid.

Q: Can I bake this in the oven instead of the microwave?
A: Yes! Bake at 350°F (175°C) for 12–15 minutes in a ramekin or oven-safe mug.

Q: Is Keystone Pantry Allulose necessary, or can I use another sweetener?
A: Allulose works best here because it behaves like sugar in baking. You can use erythritol or monk fruit blends, but the texture may be slightly different.

Q: Can I make this dairy-free?
A: Yes—use coconut oil instead of butter and skip the mascarpone or top with whipped coconut cream.

Q: How many carbs are in this mug cake?
A: Just 5g net carbs per serving, making it perfect for a keto-friendly dessert.

👉 This Keto Lemon Mug Cake is the ultimate quick, sugar-free, gluten-free dessert for anyone on a low-carb lifestyle. Bursting with bright citrus flavor, it’s the perfect single-serve treat when you need something sweet in minutes!