Microwave Mug Lemon Blueberry Cake

By , Test Kitchen Director · Reviewed by AislePrompt Editorial · ·

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A single-serving lemon blueberry cake made in the microwave for a fast, bright, and fruity dessert with minimal ingredients. This recipe, ready in about 7 minutes, layers all-purpose flour, granulated sugar, baking powder into a dessert worth slowing down for — great for weekend baking, holiday tables, or any time you want a sweet payoff at the end of a meal. Each serving lands at about 250 calories and feeds 1, so it slots into a weekend bake or a special-occasion dessert tray. Tap "Plan a meal with the AI" below to drop this recipe into your week and send the ingredients straight to Instacart. Nutrition values are approximate, calculated from USDA FoodData Central (fdc.nal.usda.gov) — verify against ingredient labels for any health-driven dietary plan.

Prep: 5 min Cook: 2 min Serves 1 Desserts cuisine 250 cal/serving
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Ingredients

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Instructions

  1. Step 1: In a microwave-safe mug, whisk together 4 tbsp all-purpose flour, 3 tbsp granulated sugar, and 1/4 tsp baking powder until combined.
  2. Step 2: Add 3 tbsp milk, 1 tbsp vegetable oil, 1 tsp lemon zest, and 1/4 tsp vanilla extract to the dry ingredients. Stir thoroughly to form a smooth batter.
  3. Step 3: Gently fold in 2 tbsp fresh blueberries, distributing evenly throughout the batter.
  4. Step 4: Microwave on high for 90 seconds until the cake has risen and is set to the touch. Let cool for 1 minute before enjoying straight from the mug.

Frequently asked questions

How long does Microwave Mug Lemon Blueberry Cake take to make?

Total time is about 7 minutes (5 min prep + 2 min cook). Most home bakers find this fits a weekend afternoon; chill or store as the recipe directs before serving.

How do I store leftover Microwave Mug Lemon Blueberry Cake?

Cool fully before storing. Most baked desserts keep at room temperature in an airtight container for 2–3 days, or in the fridge for up to 5 days. Cream- or custard-based desserts must go in the fridge within 2 hours; reheat gently or serve cold per the recipe.

Can I substitute ingredients in Microwave Mug Lemon Blueberry Cake?

Yes — most ingredients in this recipe have flexible swaps. For oil, use any neutral high-smoke-point oil (avocado, grapeseed, refined coconut). For aromatics, dried herbs at ⅓ the volume of fresh work in a pinch. The full ingredient list is shoppable on Instacart so you can see substitutes in real time.

How do I scale Microwave Mug Lemon Blueberry Cake for a different number of people?

The recipe is written for 1 servings. Multiply each ingredient by (your serving target / 1). Cook time stays roughly the same up to 2x; for 3-4x batches, switch from a skillet to a sheet pan or stockpot so the food isn't crowded — overcrowding steams instead of browns.

What goes well with Microwave Mug Lemon Blueberry Cake?

Desserts desserts like this pair well with a simple grain (rice, couscous, or crusty bread), a quick salad with acid (lemon vinaigrette, pickled onions), and a pan sauce or yogurt-based dip. Tap "Plan a meal with the AI" to get specific side suggestions.

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