Name: Irresistible Peanut Butter Mug Cookie Ready in 15 Minutes
Prep time: 5 min
Cook time: 1 min
Total time: 15 min
Ingredients: 1 tablespoon Butter (softened); 1 tablespoon Creamy Peanut Butter; 2 tablespoons Sugar (brown sugar for deeper flavor recommended); 1 large Egg Yolk (or flax egg for vegan option); 3 tablespoons All-Purpose Flour (gluten-free flour can be used at a 1:1 ratio); 1 tablespoon Milk (2%) (any plant-based milk for dairy-free version); 1/4 teaspoon Vanilla Extract (almond extract as an alternative); 1 tablespoon Chopped Unsalted Peanuts (can substitute with chocolate chips or omit)

A cozy evening often calls for one simple comfort: a warm cookie, fresh out of the microwave. Picture this: the rich smell of peanut butter mingling with a hint of vanilla fills the air as you prepare a treat that requires little more than a mug and a few pantry staples. This Quick & Easy Peanut Butter Mug Cookie is my go-to for satisfying those late-night cravings without the fuss of baking an entire batch.

In just 15 minutes, you can have a delightful dessert that’s soft, chewy, and incredibly delicious. Best of all, it’s a single-serve wonder that allows you to get creative—whether you add chocolate chips for a sweet surprise or a sprinkle of cinnamon for a warm twist. With gluten-free options available and room for variations, this mug cookie is adaptable enough to suit any mood. Let’s dive into this quick and satisfying recipe perfect for any cookie lover!

Why is this Mug Cookie a Must-Try?

Quick and Easy: This recipe simplifies your dessert cravings into just one mug, requiring minimal prep time and clean-up.
Irresistible Aroma: The mouthwatering scent of melting peanut butter and vanilla fills your kitchen as it cooks, creating an inviting atmosphere.
Customizable Options: Feel free to swap ingredients to match your preferences, from different nut butters to add-ins like chocolate chips or oats.
Single-Serve Indulgence: Enjoy a freshly baked treat without the temptation of leftovers haunting your kitchen.
Perfectly Textured: Expect a cookie that’s soft in the center and slightly crispy around the edges—a delicious balance!
For more love from your kitchen, try my easy gluten-free baking recipes that friends and family will adore!

Mug Cookie Ingredients

For the Mug Cookie
• Butter – Adds moisture and richness; always use softened butter for easy mixing.
• Creamy Peanut Butter – Provides fantastic flavor and structure; chunky peanut butter can be used for added texture.
• Sugar – Sweetness at its best; consider brown sugar for a deeper flavor.
• Egg Yolk – Binds ingredients while adding moisture; for a vegan option, you can substitute with a flax egg.
• All-Purpose Flour – Gives strength and structure; swap in gluten-free flour at a 1:1 ratio for a gluten-free mug cookie.
• Milk (2%) – Adds moisture to your cookie; try any plant-based milk for a dairy-free version.
• Vanilla Extract – Enhances the overall flavor; almond extract makes a delightful alternative.
• Chopped Unsalted Peanuts – Offers a lovely crunch; these can be replaced with chocolate chips or omitted entirely.

How to Make Mug Peanut Butter Cookie

Spray a 12-ounce mug with cooking spray to prevent sticking. This simple step ensures that your delicious cookie slides out easily—no mess!
Melt the butter in the mug by microwaving it on high for about 10 seconds. You want it just softened, not bubbling!
Stir in the creamy peanut butter and sugar until fully combined. The mixture should be smooth and fragrant, inviting you to take the next step.
Mix in the egg yolk, ensuring it’s well incorporated before moving on. Then, gradually stir in the flour until just combined, creating that perfect dough texture.
Add the milk and vanilla extract, mixing well to incorporate all ingredients. You’re building a lovely, rich batter that’s almost ready for the microwave!
Top with chopped peanuts if desired, adding a delightful crunch to each bite. Feel free to replace these with chocolate chips if you’re in the mood for something sweeter!
Microwave on high until set, which should take approximately 1 to 1.5 minutes. Keep a close watch—the cookie should look slightly puffed and firm but still soft in the center.
Serve immediately for the best taste and texture. This mug cookie is a delightful treat, perfect for indulging your cravings!

Optional: Top with ice cream or whipped cream for an extra-special treat.

Exact quantities are listed in the recipe card below.

Expert Tips for the Best Mug Cookie

• Watch Closely While Cooking: Microwaves vary in wattage; stay nearby to prevent overcooking your mug cookie, which can turn it rubbery.

• Serve Hot and Fresh: For optimal flavor and texture, enjoy your mug cookie straight out of the microwave—it’s wonderfully soft and gooey!

• Customizable Ingredients: Don’t hesitate to mix things up! Use different nut butters or add-ins like chocolate chips to tailor your mug cookie to your taste.

• Refrigerate Dough: If you’re preparing the cookie dough ahead of time, keep it in the refrigerator covered for up to two days, making it easy to enjoy a quick dessert whenever cravings strike!

• Experiment with Flavors: Consider adding spices like cinnamon or other extract options to enhance the flavor profile of your mug cookie.

What to Serve with Mug Peanut Butter Cookie?

Imagine indulging in a warm, gooey cookie while also enjoying the delightful flavors of complementary dishes.

Vanilla Ice Cream: A scoop of creamy vanilla ice cream adds a refreshing contrast to the warm cookie, balancing rich flavors beautifully. The melting ice cream mingles with the peanut butter for an extra indulgent experience.
Chocolate Milk: A glass of chocolate milk enhances the sweet tooth journey, pairing perfectly with the peanut butter’s saltiness. It’s a nostalgic combination that brings comfort to every bite!
Fruit Salad: A vibrant, fresh fruit salad introduces contrasting textures and a hint of acidity, effortlessly lightening the dessert experience. Sweet berries, bananas, or apples add a delightful freshness.
Whipped Cream: A dollop of light and airy whipped cream adds a lovely creaminess. You can also sprinkle in some cocoa powder or chocolate shavings for extra flair!
Coffee or Espresso: A cup of warm coffee or a shot of rich espresso makes for a comforting pairing, allowing the nutty flavors of the cookie to shine even brighter.
Fudge Sauce: Drizzling warm fudge sauce on top takes indulgence to another level! The deep chocolate flavor melds wonderfully with the peanut butter, creating a decadent dessert experience.
Chocolate Chips: If you’re already adding chocolate chips to the mug cookie, consider serving some on the side! That way, you’ll have sweet bites ready to pop in your mouth with every forkful.

How to Store and Freeze Mug Cookie

Fridge: Store any leftover mug cookie in an airtight container for up to 2 days. This ensures it stays fresh and maintains its delightful texture.

Freezer: For longer storage, freeze the cookie individually wrapped in plastic wrap for up to 1 month. When ready to enjoy, thaw in the fridge overnight before reheating.

Reheating: Microwaving the mug cookie for about 10-15 seconds should revive its soft, chewy goodness. Enjoy it warm for the best experience!

Mug Cookie Variations

Feel free to let your creativity shine by customizing this delightful treat in so many fun ways!

Chocolate Chip Delight: Mix in a generous handful of chocolate chips for a rich, melty surprise in every bite. Who can resist that gooey goodness?
Nut Butter Swap: Experiment with almond or cashew butter for a new flavor profile while retaining that delightful creaminess. Each nut butter offers its unique taste twist!
Cinnamon Spice: Add a sprinkle of cinnamon for warmth and extra comfort. This little spice can elevate your cookie to cozy levels that remind you of home.
Oatmeal Boost: Stir in some rolled oats for added texture and a heartier cookie. It transforms the simple dessert into a satisfying snack that feels wholesome!
Dairy-Free Option: Substitute cow’s milk with almond, soy, or oat milk to create a completely dairy-free treat without sacrificing flavor.
Sweetly Fruity: Toss in a handful of raisins or dried cranberries for a hint of sweetness. They provide a lovely contrast to the rich peanut butter flavor.
Salted Caramel Twist: A dash of salted caramel sauce on top before serving can add an extravagant layer of flavor that takes your cookie to the next level of indulgence.
Nutty Crunch: Replace chopped peanuts with crushed nuts like pecans or walnuts for a different texture and nutty flavor that complements the peanut butter beautifully.

Make Ahead Options

These Mug Peanut Butter Cookies are perfect for busy home cooks who love the idea of delectable desserts ready on demand! You can prepare the cookie dough up to 24 hours in advance, simply mixing all the ingredients and storing the mug covered with plastic wrap in the refrigerator. This not only saves you valuable time when cravings strike but also ensures the flavors meld beautifully. When you’re ready to indulge, just microwave the prepared mug for 1 to 1.5 minutes until set, and enjoy the same warm, comforting goodness as if it were freshly made. For the best results, monitor the cooking time closely to avoid overcooking—your personal cookie adventure awaits!

Mug Peanut Butter Cookie Recipe FAQs

What kind of peanut butter is best for this mug cookie?
I recommend using creamy peanut butter for a smooth texture, but chunky peanut butter can also be delightful for added crunch. Always opt for a brand that you love, as the flavor will shine through in your cookie!

How should I store leftovers of the mug cookie?
Store any leftover mug cookie in an airtight container at room temperature for up to 2 days. If you want to preserve its deliciousness longer, wrap it tightly in plastic wrap and place it in the refrigerator to maintain its soft, chewy texture.

Can I freeze the mug cookie dough?
Absolutely! If you want to prepare the dough ahead of time, simply make it, then wrap it tightly in plastic wrap and store it in the freezer for up to 3 months. When you’re ready to indulge, thaw it overnight in the fridge and follow the cooking instructions as usual.

What should I do if my mug cookie overcooked in the microwave?
If your mug cookie comes out overcooked and rubbery, don’t worry! You can try adding a small scoop of ice cream on top to add moisture and enhance the flavors. In the future, remember that microwaves vary, so start with the lower cooking time and check for doneness!

Are there any allergy considerations with this recipe?
Definitely! This mug cookie contains common allergens such as peanuts and gluten (from the flour). For a gluten-free version, use a 1:1 gluten-free flour blend. If you’re concerned about nut allergies, you can substitute the peanut butter with sunflower seed butter, which works beautifully!

Can I make this mug cookie vegan?
Yes, you can easily make a vegan version! Just replace the egg yolk with a flax egg (1 tablespoon ground flaxseed mixed with 2.5 tablespoons water, let it sit for a few minutes until it thickens). This maintains the binding properties while keeping it plant-based!