Ingredients:

  • 4 tbsp all-purpose flour
  • 2 tbsp dark brown sugar, packed
  • 1 tbsp unsalted butter, melted
  • 1 tbsp whole milk
  • 1/8 tsp baking powder
  • 1/4 tsp vanilla extract
  • 2 tbsp semi-sweet chocolate chips

Instructions:

  1. Combine the melted butter and dark brown sugar in the mug. Stir vigorously until the mixture looks like a smooth paste. Stir in the milk and vanilla extract until the liquid is fully incorporated and velvety.
  2. Add the all-purpose flour and baking powder. Mix gently with your fork until just combined—stop as soon as the flour streaks disappear to avoid a rubbery texture. Fold in the semi-sweet chocolate chips, ensuring some are pushed to the top for that classic cookie look.
  3. Place the mug in the center of the microwave. Heat on high for 45 to 60 seconds. Look for the top to become puffy and set, while the center remains slightly wet and shimmering. Let it rest for 60 seconds to allow residual heat to finish the cooking process.