Peanut Butter Cookie In A Mug Recipe

Ingredients

1 tablespoon butter, softened3 tablespoons creamy peanut butter3 tablespoons sugar1 large egg yolk1/4 cup all-purpose flour3 tablespoons 2% milk1/8 teaspoon vanilla extract1 tablespoon chopped unsalted peanuts

Preparation

Spray 12-ounce mug with cooking spray. Add butter; microwave on high until melted, about 10 seconds. Stir in peanut butter and sugar until combined. Add egg yolk; stir in flour. Add milk and vanilla extract. Top with peanuts.

Microwave on high until set, 1 to 1-1/2 minutes. Serve immediately.