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Chocolate Chip Mug Cookie

A warm, gooey single-serving cookie ready in under 5 minutes. This mug cookie has soft, chewy centers with crispy edges and melted chocolate chips throughout, perfect for satisfying late-night cravings without baking a full batch.
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Prep Time 2 minutes
Cook Time 1 minute
Total Time 3 minutes
Servings: 1 serving
Course: Dessert
Cuisine: American
Calories: 350
Ingredients Equipment Method Notes

Ingredients
  

Main
  • 3 tablespoons all purpose flour
  • 1 tablespoon granulated sugar
  • 1 tablespoon brown sugar packed
  • 1 tablespoon butter melted
  • 1 large egg yolk
  • 1/4 teaspoon vanilla extract
  • 1 tiny pinch baking soda
  • 1 tiny pinch salt
  • 2 tablespoons chocolate chips

Equipment

  • Microwave safe mug (12 ounce capacity or larger)
  • Fork or small whisk for mixing
  • Measuring spoons
  • Microwave

Method
 

  1. Place your butter in the microwave safe mug and microwave for 20 to 30 seconds until melted.
  2. Add both the granulated sugar and brown sugar to the melted butter and stir to combine.
  3. Drop in the egg yolk and vanilla extract, then whisk vigorously with a fork until well combined.
  4. Sprinkle in the flour, baking soda, and salt directly into the mug.
  5. Mix everything together until no dry flour pockets remain. Do not overmix.
  6. Gently fold the chocolate chips throughout the batter, saving a few to press on top.
  7. Microwave on high for 40 to 60 seconds, watching carefully after 40 seconds. The cookie should look slightly underdone on top.
  8. Allow the mug cookie to rest for 1 to 2 minutes before eating to let the cookie set properly.

Notes

Every microwave varies in power, so start checking at 40 seconds and add time in 10 second bursts until the edges look set but the center appears slightly glossy. Use a wider mug rather than a tall narrow one for more even cooking. Top with vanilla ice cream for an instant dessert upgrade.