Make mornings easier with a fast, satisfying keto breakfast: a keto flaxseed muffin made right in a mug. This single-serving mug muffin combines ground flaxseeds, coconut flour, a touch of cocoa, and a little sweetness for a chocolatey lift to start the day. Toss the ingredients into a microwave-safe mug, mix, and heat for about a minute. In 60 seconds you’ll have a warm, fluffy, high-fiber, high-protein, low-carb muffin that’s perfect for busy mornings or a post-workout bite.
This recipe is deliberately simple and uses pantry-friendly staples. What makes it special is how quickly it comes together and the balanced texture from flaxseed meal and coconut flour. If you prefer, grind whole flaxseeds at home and follow the mixing steps below to get consistent results every time.
This mug muffin is ideal for on-the-go mornings, quick breakfasts after a workout, or anytime you want a fiber-forward, macro-friendly treat. The cocoa adds a rich flavor that feels indulgent while keeping the carbs low. Mix, microwave, and enjoy a convenient breakfast that keeps you fueled without a lot of fuss.
It’s also a simple way to boost your morning protein and fiber.
Ingredients
Staple ingredients—most are probably already in your kitchen.
- Ground flaxseeds – use flaxseed meal or grind whole flaxseeds until fine. It acts as the primary binder and contributes fiber and omega-3s.
- Coconut flour – a low-carb, gluten-free flour that adds structure and a touch of sweetness. It absorbs moisture quickly, so the batter will thicken as it sits.
- Unsweetened cocoa powder – for chocolate flavor; Dutch-process cocoa will give a slightly deeper taste if you prefer.
- Sugar-free granulated sweetener – use your preferred keto-friendly sweetener or blend (monk fruit, allulose, erythritol). Adjust sweetness to taste.
- Baking powder – a small amount gives the muffin lift. Make sure it’s fresh for the best rise.
- Vanilla extract – enhances flavor. A pinch of salt will also brighten the cocoa and vanilla notes.
- Melted butter – provides moisture and a tender crumb. Substitute neutral oil only if necessary.
- Egg – room temperature works best and should be mixed thoroughly for a non-eggy taste. For a vegan option, use a flax egg (1 tbsp ground flax + 3 tbsp water, set until gelatinous).
Those are the ground flaxseeds you’ll use if you grind them yourself.
Instructions
Choose your mug
Use a microwave-safe mug with plenty of room for the batter to rise—around 15 oz or a large coffee cup works well. A wider mug helps the muffin cook evenly and prevents overflow.
Grind flaxseeds
If you don’t have flaxseed meal, grind whole flaxseeds in a blender or food processor:
- Pour about 1/4 cup whole flaxseeds into the blender—enough to reach the blades.
- Pulse or blitz until the seeds become a fine meal.
Mix it up
Add the ingredients to your mug, mix thoroughly, and microwave. Simple as that.
- Grease the mug with oil or cooking spray so the muffin doesn’t stick.
- Add the dry ingredients first for even distribution, stir, then add the wet ingredients.
- Mix thoroughly until there are no streaks of egg. Proper mixing avoids an eggy flavor.
- Microwave on high for about 60 seconds. Microwave strengths vary—start with 30–40 seconds and add short bursts if needed to avoid overcooking.
FAQ
Yes—use any microwave-safe mug. A 15 oz wide mug is recommended for even cooking and to prevent spills as the muffin rises.
Almond flour can be used instead, but quantities may need tweaking because almond flour absorbs liquid differently.
Yes—use a flax egg (1 tbsp ground flaxseed + 3 tbsp water, set until gel-like) as a vegan substitute.
Microwave wattage varies. Start with 30–40 seconds, check, then add 10–20 second bursts until done. Aim for a moist center without overcooking.
It’s best fresh, but you can mix the dry ingredients in the mug the night before; add the wet ingredients and microwave in the morning.
Overcooking is the usual cause. Reduce microwave time or add a splash of milk if the batter seems too thick.
Insufficient mixing, too much egg, or strong-flavored eggs can cause egginess. Mix thoroughly, try egg whites, or add an extra tablespoon of fat or more flour to balance flavors.
Yes—stir in a tablespoon of nuts, sugar-free chocolate chips, nut butter, cream cheese, or berries. Keep carb counts in mind if you’re strict keto.
Yes—bake at 350°F (175°C) for about 15–18 minutes in a small ramekin or mini muffin tin, until a toothpick comes out clean.
More breakfast recipes to explore:
- 11 Amazing Quick & Easy 5-Minute Keto Breakfast Ideas
- 50 Carnivore Breakfast Recipe Ideas
- 11 Quick & Easy Mediterranean Breakfast Ideas
- Keto Chocolate Flaxseed Muffins
- Keto Egg Bites (Starbucks-style)
Recipe
Keto Flaxseed Muffin In A Mug
Ingredients
- 1 tablespoon flaxseeds, ground
- 1 tablespoon coconut flour
- 1 tablespoon cocoa powder, unsweetened
- 2 tablespoons sugar-free granulated sweetener
- ¼ teaspoon baking powder
- ¼ teaspoon vanilla extract
- 1 tablespoon butter, melted
- 1 egg
Instructions
- Grind flaxseeds in a blender or food processor until fine.
- Grease a large mug or ramekin with oil or cooking spray.
- Add ground flaxseeds, coconut flour, cocoa powder, sweetener, baking powder, vanilla extract, melted butter, and egg to the mug.
- Mix well with a fork until there are no streaks of egg.
- Microwave for about 60 seconds, adjusting time as needed for your microwave.
Notes
Choose the right mug: A wide 15 oz microwave-safe mug helps prevent spills and promotes even cooking.
Mix thoroughly: Mix until no egg streaks remain to avoid an eggy texture.
Microwaving: Microwaves vary—start shorter and add time in small increments. Slightly underbaking the center keeps the muffin moist.
Nutrition note: Nutrition calculations depend on the brands you use. If tracking carbs closely, use a nutrition app with your exact ingredients for the most accurate numbers.
Nutrition
Calories: 291 kcal |
Net Carbohydrates: 5.14 g
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