2-Minute Blueberry Mug Cake

A warm, tender vanilla cake studded with juicy blueberries, made entirely in a mug and ready in the time it takes to find a spoon. It is the single-serving dessert I reach for when a real craving hits and I do not want a full cake staring back at me from the counter.

Why This One Stays in the Rotation

It gives you a just-baked cake with a soft crumb and pockets of jammy fruit, no oven, no waiting, and almost nothing to wash up. The whole thing happens in one mug, and the batter comes together with a fork in under a minute.

The blueberries burst as they cook, leaving little purple streaks through the vanilla cake, so every spoonful tastes like a proper bakery muffin. It is not a compromise dessert, it is a smart little shortcut that actually delivers.

Ingredients

• 3 tbsp all-purpose flour: spooned and leveled, not scooped
• 2 tbsp granulated sugar
• 1/4 tsp baking powder
• Pinch of salt
• 3 tbsp milk: any dairy or unsweetened non-dairy milk works
• 1 tbsp vegetable oil or melted butter: butter gives a richer flavor, oil keeps it extra moist
• 1/4 tsp vanilla extract
• 2 tbsp fresh blueberries: if using frozen, do not thaw them first

Variations / Substitutions

• Gluten-free: swap in a 1-to-1 gluten-free flour blend that contains xanthan gum, the texture will be a touch more tender but still works.
• Less sweet: drop the sugar to 1 1/2 tbsp, the blueberries carry a lot of natural sweetness.
• Lemon blueberry: stir in 1/4 tsp lemon zest with the wet ingredients, it brightens the whole thing.
• Dairy-free: use a neutral oil and a creamy non-dairy milk like oat or almond, and the crumb stays soft.

Try a juicy Peach Mug Cake next, it uses ripe summer fruit and a little cinnamon.

How to Make Blueberry Mug Cake

Step 1: Mix the Dry Ingredients

Grab a standard 10 to 12 oz microwave-safe mug, the taller the better so the batter has room to climb. Add the 3 tbsp flour, 2 tbsp sugar, 1/4 tsp baking powder, and a pinch of salt, then stir with a fork until everything looks evenly combined and no lumps remain.

Step 2: Stir in the Wet Ingredients and Blueberries

Pour the 3 tbsp milk, 1 tbsp oil or melted butter, and 1/4 tsp vanilla straight into the mug. Stir with the fork until the batter is smooth and you do not see any dry streaks, about 15 seconds. Scatter the 2 tbsp blueberries on top and fold them in gently with just a few strokes so they stay mostly whole and do not break.

Step 3: Microwave and Serve

Microwave the mug on high until the top looks set and springs back when you press it lightly, about 60 to 90 seconds, depending on your microwave. Let it cool for 1 minute right in the mug, the cake will continue to set as it sits. Finish with a small scoop of vanilla ice cream or a dollop of whipped cream and eat it while it is still warm.

A Few Notes Before You Start

• Overmixing the batter once the wet ingredients go in makes the cake chewy, so stop stirring the moment it looks smooth.
• Use a mug with straight sides and at least 10 oz capacity, the cake rises a fair bit and a short wide mug can overflow.
• Check the cake at 60 seconds and add time in 10-second bursts; a 900-watt microwave takes mine right around 75 seconds, but a weaker one may need up to 90.

Cook times by microwave wattage:

Frequently Asked Questions

Can I use frozen blueberries?

Yes, do not thaw them, toss them in frozen and add 10 to 15 seconds to the cook time so the batter around the cold berries sets properly.

Can I skip the egg?

The recipe does not use an egg, so no substitution needed, the baking powder and milk give the cake its lift and tenderness.

Can I double the recipe to make two?

Doubling in one mug cooks unevenly, it is better to make two separate mugs side by side and microwave them one at a time.

How do I prevent a gummy center?

Make sure your baking powder is still active and stop the microwave as soon as the top looks dry, then let it rest the full minute, the residual heat finishes cooking the center.

Blueberry Mug Cake Recipe

Print Recipe Pin Recipe

Prep Time 1 minute min

Cook Time 1 minute min

Total Time 2 minutes mins

Servings: 1 servings

Calories: 380

Ingredients Method Notes

Ingredients

  

• 3 tbsp all-purpose flour
• 2 tbsp granulated sugar
• 1/4 tsp baking powder
• Pinch of salt
• 3 tbsp milk
• 1 tbsp vegetable oil or melted butter
• 1/4 tsp vanilla extract
• 2 tbsp fresh blueberries

Method

 

1. In a 10-12 oz microwave-safe mug, stir together the flour, sugar, baking powder, and salt with a fork.
2. Add the milk, oil or melted butter, and vanilla, stir until smooth, then gently fold in the blueberries.
3. Microwave on high for 60-90 seconds until the top is set, cool 1 minute, top as you like, and serve warm.

Notes

If your microwave runs hot, check at 50 seconds and add time in small bursts. A tall mug prevents batter from climbing over the edge. This cake is best eaten right away while the blueberries are still warm and jammy.