Lemon Mug Cake Recipe

Craving a bright, tangy dessert but don’t want to heat the oven or make a whole cake? The lemon mug cake is your answer: ready in just minutes, bursting with citrus flavor, and offering the ultimate in portion control.

With simple ingredients and the magic of a microwave, this cake is moist, fluffy, and can be endlessly customized for any occasion.

This guide covers everything you need for mug cake success, from precise ingredient measurements to troubleshooting and creative toppings. Whether you’re new to baking or a seasoned home cook, you’ll master this single-serve treat with confidence.

Ingredients Checklist

Gathering the right ingredients is essential for both taste and texture. Here’s a clear, measured list to make your lemon mug cake a hit every time:

• For the Lemon Mug Cake:

  • 4 tablespoons (30g) all-purpose flour

  • 3 tablespoons (36g) granulated sugar

  • 1/4 teaspoon baking powder

  • Pinch of salt

  • 1 large egg yolk (or use 2 tablespoons milk for egg-free)

  • 2 tablespoons (30ml) whole milk (or any milk of choice)

  • 2 tablespoons (30g) melted unsalted butter (or neutral oil for dairy-free)

  • 2 tablespoons (30ml) fresh lemon juice

  • 1 teaspoon finely grated lemon zest

  • 1/4 teaspoon pure vanilla extract (optional)

  • 1 tablespoon white chocolate chips or blueberries (optional add-in)

• For the Quick Lemon Icing (optional):

  • 2 tablespoons powdered sugar

  • 1 teaspoon lemon juice

  • Extra lemon zest, for garnish

• Equipment:

  • 12–14 oz microwave-safe mug or ramekin

  • Small whisk or fork

  • Measuring spoons

  • Microwave

Step-by-Step Instructions

Starting with a simple mixing technique is the secret to a soft, fluffy mug cake. Here’s a quick guide to perfect results:

• Begin by lightly greasing your mug with oil or butter to prevent sticking.

• In the mug, whisk together flour, sugar, baking powder, and a pinch of salt until well combined.

• Add the egg yolk, milk, melted butter, lemon juice, lemon zest, and vanilla extract. Whisk until the batter is smooth and free of lumps, but avoid overmixing.

• If using, fold in white chocolate chips or blueberries for extra flavor and texture.

• Tap the mug gently on the counter to settle the batter and release air bubbles.

• Microwave on high for 1 minute and 20 seconds to 1 minute and 40 seconds, depending on your microwave’s power (start checking at 1:15). The cake should rise, look set on top, and spring back when touched.

• Let the mug cake cool for 2–3 minutes. For icing, mix powdered sugar and lemon juice to a drizzle consistency and pour over the cake. Sprinkle with extra lemon zest for a punch of color and aroma.

• Enjoy warm directly from the mug, or carefully remove and serve on a plate.

Tips for Perfect Results

A few practical baking tips ensure every lemon mug cake comes out tender, fluffy, and flavorful:

• Always use fresh lemon juice and zest—bottled juice lacks the bright citrus notes.

• For a lighter, egg-free mug cake, skip the egg yolk and add 2 more tablespoons milk.

• Don’t overmix the batter; a few small lumps are okay and prevent a dense cake.

• Fill your mug no more than halfway to avoid overflow during cooking.

• Microwave wattages vary—if your cake is underdone, cook in 10-second intervals; if it’s dry, reduce cooking time.

• For an airier texture, sift your flour before adding.

• Let the mug cake cool for a couple of minutes before adding icing or digging in—this helps set the crumb and avoids a gummy center.

Serving Suggestions

Lemon mug cake is delicious on its own, but these serving ideas make it feel extra special:

• Top with a scoop of vanilla or lemon ice cream for a quick dessert.

• Add a dollop of whipped cream and a few fresh berries for a café-style treat.

• Drizzle with a simple raspberry or blueberry sauce for a vibrant color and tart contrast.

• Sprinkle with chopped pistachios or toasted coconut for crunch.

• Serve with a cup of herbal tea, iced lemonade, or coffee for a refreshing pairing.

Final Thoughts

The lemon mug cake recipe brings all the sunny, zesty flavor of a classic lemon cake with none of the fuss. Whether you’re baking for one, want portion control, or need a quick fix for your citrus cravings, this recipe delivers. With easy ingredient swaps for vegan and gluten-free options, plus plenty of room for creative add-ins, the lemon mug cake will become a go-to in your dessert repertoire. For the best results, use fresh lemons, adjust cooking time to your microwave, and have fun experimenting with toppings—because sometimes the simplest recipes are the most satisfying.