Peanut Butter Cookie in a Mug

This peanut butter cookie in a mug recipe is that quick, fool-proof recipe you can get onto when you’re hit by a craving! 

Got a sweet tooth but don’t want to spend all that time in the kitchen baking a batch of cookies? This peanut butter cookie in a mug recipe is here to the rescue. It is exactly what it sounds like- a super simple recipe that takes minutes to put together, and has that creamy, delicious peanut butter flavor that you’re craving for. 

Ready to give it a shot already? Here’s everything you need to know about it. 

Ingredients For the Recipe

You’ll need some basic ingredients to make the mug cookie. 

• 1 tablespoon butter
• 3 tablespoon creamy peanut butter
• 3 tablespoon sugar
• 1 large egg yolk
• ¼ cup all-purpose flour
• 3 tablespoon milk
• ⅛ teaspoon vanilla
• 1 tablespoon chopped unsalted peanuts

How to Make the Peanut Butter Cookie in a Mug

Got all the ingredients ready? Here’s how to proceed with making the cookie. 

Take one big mug and add a little oil on all the sides. 

Add the butter and put it in a microwave for a few seconds until it melts. 

Add peanut butter and sugar and mix with a spoon. 

Pour in the yolk and the flour and mix again. 

Add the milk and the vanilla and mix for the last time. 

Add the peanuts on the top. 

Put the mug in a microwave for 1 or 1:30 minutes. 

You will see when it is baked the mixture should be a darker brown and not liquid at all.

Serve a few minutes later, when it chills a little.

Can I Use Chunky Peanut Butter?

You definitely can! If you don’t mind your cookie having those little peanut chunks in every bite, go for it! Always use high-quality peanut butter, because that is what will give your cookie that rich, creamy taste and flavor that you’re looking for. 

What Else Can I Add?

You can add just about anything you like into this peanut butter cookie in a mug. Peanut butter chips and butterscotch chips are great if you want to stick to the classic flavors of the cookie. 

If you don’t mind experimenting, you can throw in some mini chocolate chips or chocolate chunks- or even some Hershey’s kisses. 

What Other Variations Can I Try?

Loved the idea of creating a single serving cookie in a mug, but not so sure about the peanut butter flavor? You can actually replicate the same recipe but with different ingredients too. Here are a few ideas that you can try out and enjoy. 

Chocolate: Want to try out this mug cookie in your favorite chocolate flavor? Throw some unsweetened cocoa powder into the mix, and then add some chocolate chips, or chocolate chunks to add in a bit of texture. And of course, don’t forget a drizzle of Nutella or your favorite chocolate sauce on the top! 

Nuts: Got some chopped nuts? Why not add them to your cookie in a mug? Roasted macadamia nuts, pecans, walnuts, and almonds are perfect and super versatile too! 

Berries: Fresh or dried berries can be excellent additions to basic cookie dough. They add a nice tart flavor to the cookie and are healthy too! 

Lotus Biscoff: Got a Biscoff fan in you? You can add some crushed Biscoff into the cookie batter and top the cookie with some Biscoff spread to finish it off. And of course, some butterscotch chips if you’re feeling fancy. 

Oreo: Who doesn’t love Oreos? Throw some Oreo crumbs into the basic cookie mixture, and top the cookie with some hot fudge and more Oreo crumbs once you’re done getting it out of the oven. 

Can I Make the Peanut Butter Cookie in a Mug Without the Egg Yolk?

Yes, you actually can! Since the cookie is just a single serving, you can skip the egg. You’ll need to add a pinch of baking powder into the mix though, and then possibly some extra milk to get the cookie mixture to the right consistency. 

The baking powder is what will help the cookie rise a bit, instead of being all dense and dry. 

Tips & Tricks to Nail the Recipe

The recipe is super simple, sure- but keep these little tips and hacks in mind, and you’ll be able to nail it. 

• Because this cookie in a mug is made in the microwave, you won’t need to add any leavening agent into the mix. The egg yolk will do its job well. 
• To lend the cookie that extra dash of saltiness, throw a bit of sea salt into the mix. This is true when it comes to practically any other dessert recipe you’re trying your hands at - the salt balances out the sweetness really well. 
• You can substitute the white sugar for brown sugar to give the peanut butter cookie an extra depth of flavor. 
• To elevate the flavor of the peanut butter in the cookie, you can add a pinch of cinnamon powder or some instant coffee powder too. 

Serving Ideas & Suggestions

Got your cookie in a mug ready? You can grab a spoon and dig into it just like that while it is still warm, or top it with a scoop of vanilla ice cream if you’re having a bad day. 

If you don’t have vanilla ice cream, a spritz of cool whip on the top can do the magic too. 

Alternatively, you can drizzle a bit of caramel sauce (or chocolate sauce if you’re adding chocolate chips or any other chocolate element into the mix) to make the cookie extra moist and full of flavor. 

Loved how easy it was to make this recipe? Want to try out some more fun and easy dessert recipes that don’t need a lot of ingredients? You might want to check these out! PS: All of these have peanut butter in them! 

• Old Fashioned Peanut Butter Candy
• No-Bake Chocolate Oatmeal Peanut Butter Cups
• Easy Peanut Butter Mashed Potato Candy Recipe