Moist & Fruity Keto Blueberry Mug Cake in Minutes
When you’re craving something sweet, fruity, and low in carbs, this keto blueberry mug cake hits the spot.
Made with almond flour, fresh or frozen blueberries, and a touch of vanilla, it’s a light and satisfying treat you can whip up in under five minutes.
The texture is soft and moist, thanks to melted butter and almond milk, while the blueberries bring bursts of tangy-sweet flavor. No oven needed—just a mug and a microwave!
You’ll be mixing almond flour (2 tbsp) with 1/2 tbsp melted butter, 2 tbsp almond milk, a dash of vanilla extract, 1/2 tbsp keto sweetener, 1/4 tsp baking powder, and 6–8 blueberries.
All ingredients combine right in the mug before microwaving into fluffy goodness.
Prep & Cook Details
| Prep Time | Cook Time | Total Time | Course | Cuisine | Servings |
|---|---|---|---|---|---|
| 3 mins | 1.5 mins | 4.5 mins | Dessert / Snack | Keto / Low-Carb | 1 |
Ingredients
| Almond Flour | Blueberries | Butter (melted) | Almond Milk | Sweetener | Baking Powder | Vanilla Extract | Salt (pinch) |
|---|---|---|---|---|---|---|---|
| 2 tbsp | 6–8 | 1/2 tbsp | 2 tbsp | 1/2 tbsp | 1/4 tsp | 1/4 tsp | Yes |
Alternatives:
- Almond flour: Swap with coconut flour (1 tbsp) and add 1 more tbsp almond milk.
- Blueberries: Use frozen, but do not thaw them first.
- Butter: Coconut oil works too.
- Sweetener: Erythritol, monk fruit, or stevia—adjust to taste.
Cooking Tools
| Tool | Alternatives |
|---|---|
| Microwave-safe mug | Ramekin or bowl |
| Spoon | Whisk or fork |
| Microwave | Oven (350°F, 10–12 min) |
How to Make It – Step by Step
Lets make it!
Step 1: Mix Dry Ingredients
In a mug, combine 2 tablespoons of almond flour, 1/2 tablespoon of keto sweetener, 1/4 teaspoon of baking powder, and a pinch of salt. Stir well.
Step 2: Add Wet Ingredients
Add 1/2 tablespoon melted butter, 2 tablespoons unsweetened almond milk, and 1/4 teaspoon vanilla extract. Mix until smooth and thick.
Step 3: Fold in Blueberries
Gently fold in 6–8 fresh or frozen blueberries. Spread them evenly so you get fruit in every bite.
Step 4: Microwave
Place your mug in the microwave and heat on high for about 90 seconds. The cake should puff up and set but remain soft.
Step 5: Cool & Serve
Let it cool for 30 seconds before enjoying. Top with whipped cream, a dash of cinnamon, or more fresh blueberries if desired.
Starter Tip Before Cooking
Always stir almond flour thoroughly to break clumps before adding wet ingredients. If using frozen blueberries, don’t defrost them—this helps them hold their shape during cooking.
Serving Tips
- Add a dollop of sugar-free whipped cream on top.
- Drizzle with a teaspoon of lemon glaze (lemon juice + sweetener).
- Sprinkle with cinnamon or powdered erythritol for a finishing touch.
Variations to Try (Detailed)
Keto Blueberry Muffins Mug Cake
Turn your mug cake into a muffin-like experience by increasing almond flour to 3 tbsp and adding 1/4 tsp cinnamon to the mix.
Use 1/2 tsp vanilla extract for a bakery-style aroma. Microwave for 100–110 seconds for a denser muffin texture. Top with crushed almonds or shredded coconut before microwaving.
Keto Blueberry Lemon Mug Cake
Add 1/2 tsp lemon zest and 1/4 tsp lemon juice to the batter. This pairs beautifully with the blueberries and gives the mug cake a fresh, zesty lift.
You can also substitute vanilla extract with lemon extract for an even stronger citrus punch. Optional: drizzle with a keto lemon glaze after microwaving.
Keto Blueberry Cheesecake Mug Cake
Mix in 1 tbsp softened cream cheese into the wet ingredients and stir well until fully blended before adding blueberries.
This creates a creamy, slightly tangy base that mimics cheesecake. For extra richness, swirl a second teaspoon of cream cheese on top before microwaving. Optional: top with a crushed keto graham cracker.
Keto Blueberry Cream Cheese Mug Cake
Use the standard base and add 2 tsp cream cheese chunks directly into the mug after mixing the batter—don’t blend, just insert them for creamy bites throughout.
You can also layer the cream cheese: batter → cream cheese → batter. It creates pockets of gooey creaminess in each spoonful.
Storage Tips
- Best eaten immediately.
- To store: Cover and refrigerate for up to 1 day.
- Reheat: Microwave for 15–20 seconds before serving.
Mistakes & Fixes
| Mistake | Solution | Prevention |
|---|---|---|
| Cake is too dry | Add 1 more tbsp almond milk | Don’t overcook in the microwave |
| Blueberries sink | Coat berries in almond flour first | Fold them in gently |
| Too sour (lemon version) | Reduce lemon juice to 1/8 tsp | Balance with more sweetener |
| Texture too dense | Use fresh blueberries and mix well | Avoid over-mixing the batter |
Keto Blueberry Mug Cake
This keto-friendly blueberry mug cake is a soft, warm treat made in under five minutes.
With almond flour, melted butter, and sweet blueberries, it offers a moist texture and light sweetness—perfect for a quick dessert or snack without breaking your carb limit.
Ingredients
- Almond flour – 2 tbsp (or use 1 tbsp coconut flour + 1 more tbsp almond milk)
- Blueberries – 6–8 (fresh or frozen; don’t thaw if frozen)
- Butter (melted) – 1/2 tbsp (coconut oil as alternative)
- Almond milk – 2 tbsp (unsweetened)
- Keto sweetener – 1/2 tbsp (erythritol, monk fruit, or stevia)
- Baking powder – 1/4 tsp
- Vanilla extract – 1/4 tsp
- Salt – pinch
Instructions
Mix Dry Ingredients
In a microwave-safe mug, stir together almond flour, sweetener, baking powder, and a small pinch of salt until evenly combined.
Add Wet Ingredients
Add melted butter, almond milk, and vanilla extract. Mix well until the batter is smooth and thick.
Fold in Blueberries
Gently fold in blueberries, spacing them throughout the batter for balanced fruity bites.
Microwave
Microwave on high for about 90 seconds.
The cake should rise and set but still feel soft when lightly pressed.
Cool and Serve
Let it cool for about 30 seconds before eating. Optionally, top with whipped cream, a dusting of erythritol, or a drizzle of lemon glaze.
Notes
- Stir almond flour thoroughly to avoid clumps
- Use frozen blueberries without thawing to retain shape
- Don’t overcook—start with 90 seconds and check texture
- Add more almond milk if batter feels dry before microwaving
Wrap-Up
This keto blueberry mug cake is a fast, fruity dessert perfect for low-carb lifestyles.
Whether you prefer it plain, with lemon, or blended with cream cheese, the possibilities are sweet and satisfying.
Try each variation and find your favorite. Don’t forget to share your twist in the comments or save this for your next late-night craving!
