This Sweet & Simple Keto Mug Cake is your go-to treat when you need something indulgent yet guilt-free. In just 5 minutes, you can whip up a moist, fluffy cake that’s rich in flavor and low in carbs. The warm, chocolatey aroma fills your kitchen as it cooks in the microwave for a mere 1 minute, making it perfect for those spontaneous dessert cravings.
Every bite is a delightful mix of decadent sweetness and a soft, melt-in-your-mouth texture that feels like a cheat day without the guilt. With its keto-friendly ingredients, this mug cake satisfies your sweet tooth while keeping you on track. It’s the ultimate quick fix for a cozy night in or a midday pick-me-up.
What You’ll Need for Sweet & Simple Keto Mug Cake

- 1 tablespoon (½ oz/14g) butter (softened for easier mixing)
- 2 tablespoons (1 oz/28g) full-fat cream cheese (softened)
- 2 tablespoons (½ oz/14g) coconut flour (can substitute with almond flour, but adjust quantity as needed)
- 1 tablespoon (½ oz/14g) granulated sweetener (e.g., erythritol or monk fruit)
- 1 teaspoon vanilla extract (for flavor enhancement)
- ¼ teaspoon baking powder (ensure it’s fresh for best rise)
- 1 large egg (room temperature works best)
- 6 raspberries (fresh or frozen, for a burst of flavor)
How to Make Your Keto Mug Cake
- Soften the butter and cream cheese: Place the butter and cream cheese in a microwave-safe mug. Microwave for 20 seconds to soften.
- Mix the dry and wet ingredients: Add the coconut flour, sweetener, vanilla extract, baking powder, and egg to the mug. Mix thoroughly until smooth.
- Fold in the raspberries: Scrape down the sides of the mug, then gently fold in the raspberries to distribute evenly.
- Microwave the cake: Microwave for 1 minute (based on a 1200W microwave). Check for doneness—the cake should be firm but moist. If needed, microwave for a few more seconds.
- Cool and enjoy: Let the mug cake cool for 5 minutes before eating. Store any leftovers covered at room temperature for up to one day.
Topping Ideas to Elevate Your Mug Cake
Take your Sweet & Simple Keto Mug Cake to the next level with delicious toppings! Try a dollop of whipped cream or a drizzle of sugar-free chocolate syrup for extra indulgence. For a fresh twist, add a few extra raspberries or a sprinkle of unsweetened shredded coconut. Pro tip: A dusting of powdered erythritol can make it look bakery-worthy!
Perfect Pairings for Your Mug Cake
This mug cake pairs wonderfully with a cup of hot coffee or tea for a cozy treat. If you’re feeling fancy, serve it alongside a scoop of keto-friendly vanilla ice cream for a dessert that feels extra special. Bonus: A side of fresh berries adds a refreshing contrast to the rich cake.
Storage and Reheating Tips
If you have leftovers (though it’s hard to resist!), cover the mug with plastic wrap and store it at room temperature for up to one day. To reheat, microwave for 10-15 seconds to bring back that just-baked warmth. Note: For best texture, enjoy it fresh!
Quick Variations to Mix It Up
Feel free to customize this recipe to suit your taste! Swap raspberries for blueberries or dark chocolate chips for a different flavor profile. If you’re nut-free, almond flour can replace coconut flour in equal amounts. Experiment: Add a pinch of cinnamon or cocoa powder for a fun twist!
Microwave Power Tips for Perfect Results
Microwave wattages vary, so keep an eye on your cake to avoid overcooking. Start with 1 minute, then check and add 10-second increments if needed. Remember: The cake should be moist but firm to the touch. If it’s undercooked, a few extra seconds will do the trick!

Sweet & Simple Keto Mug Cake
Ingredients
- 1 tablespoon butter (½oz/14g)
- 2 tablespoons full fat cream cheese (1oz/28g)
- 2 tablespoons coconut flour (½oz/14g)
- 1 tablespoon granulated sweetener (½oz/14g)
- 1 teaspoon vanilla extract
- ¼ teaspoon baking powder
- 1 large egg
- 6 raspberries fresh or frozen
Instructions
- Place butter and cream cheese in a microwave-safe mug and microwave for 20 seconds to soften it.
- Add the coconut flour, sweetener, vanilla, baking powder, and egg, and mix thoroughly.
- Scrape down the sides of the mug and then gently fold in the raspberries.
- Microwave for 1 minute. Check for doneness, and microwave for a few seconds more if need be. (This timing is based on my microwave which is 1200W)
- Let cool for 5 minutes before eating. Store leftover mug cake covered at room temperature for up to one day.