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4.8 from 54 votes

Peanut Butter Cookie in a Mug

This delicious single-serve gluten-free peanut butter cookie in a mug is the perfect serving size for one or two people and takes less than 5 minutes to make!

Prep Time
3 mins
Cook Time
3 mins
Total Time
4 mins
Servings: 1 Cookie
Calories: 622 kcal
Course: Dessert
Cuisine: American

Ingredients

  • 1 Tbsp unsalted butter*
  • 3 Tbsp creamy peanut butter
  • 2 Tbsp pure maple syrup
  • 1 egg yolk
  • ½ tsp pure vanilla extract
  • 2 ½ Tbsp gluten-free all-purpose flour or regular all-purpose flour
  • ⅛ tsp sea salt

Instructions

    Cup of Yum
  1. Microwave the butter in a microwave-safe mug for 20 to 40 seconds, or until it has melted. Note: I prepare the cookie dough in a small bowl or a measuring cup first and then use a rubber spatula to transfer it over to a microwave-safe mug or ramekin. You can easily just use a mug for the whole process, which requires less cleanup.
  2. Add the peanut butter, pure maple syrup, egg yolk, and vanilla extract and mix well until everything is well-combined (wet ingredients). Note: If your peanut butter is very cold from having been sitting in the refrigerator, microwave it along with the butter to soften it up so that it stirs easily.
  3. Stir in the gluten-free all-purpose flour and sea salt (dry ingredients) and mix until a smooth batter forms. The mixture will be relatively thin and will not resemble regular cookie dough - this is normal! If you’d like, sprinkle the top with chocolate chips or mix some chocolate chips into the cookie dough.
  4. Microwave on high heat (the microwave’s default setting) for 45 to 60 seconds, or until it has set up. I recommend starting with 45 seconds then microwaving longer only if need be. Allow the mug to cool down for a minute or two before enjoying the peanut butter cookie - initially it will be very hot! The texture will look slightly crumbly but the cookie will melt in your mouth. Consider serving microwave peanut butter cookies with a scoop of ice cream or a glass of milk.

Notes

  • *Replace the butter with coconut oil, vegan butter (like Earth Balance), or avocado oil
  • *Replace the butter with coconut oil, vegan butter (like Earth Balance), or avocado oil

Nutrition Information

Serving 1cookie Calories 622kcal (31%) Carbohydrates 55g (18%) Protein 15g (30%) Fat 40g (62%) Saturated Fat 14g (70%) Polyunsaturated Fat 1g Monounsaturated Fat 5g Cholesterol 215mg (72%) Sodium 223mg (9%) Fiber 6g (24%) Sugar 31g (62%)

Nutrition Facts

Serving: 1Cookie

Amount Per Serving

Calories 622

% Daily Value*

Serving 1cookie
Calories 622kcal 31%
Carbohydrates 55g 18%
Protein 15g 30%
Fat 40g 62%
Saturated Fat 14g 70%
Polyunsaturated Fat 1g 6%
Monounsaturated Fat 5g 25%
Cholesterol 215mg 72%
Sodium 223mg 9%
Fiber 6g 24%
Sugar 31g 62%

* Percent Daily Values are based on a 2,000 calorie diet.