Cookie in a Mug Recipe

If you’re craving a warm, gooey treat but don’t have the time (or energy) to whip out a baking sheet, the Cookie in a Mug is your new weeknight hero. In mere minutes and with a handful of pantry staples, you can sink your spoon into a rich, decadent chocolate chip cookie—right in your favorite mug. Sweet, buttery, and satisfyingly soft with melty pockets of chocolate, this single-serving wonder makes solo dessert feel special. Get ready for a little kitchen magic—this Cookie in a Mug is about to become your ultimate comfort food fix.

Ingredients You’ll Need

Ingredients You’ll Need

The beauty of a Cookie in a Mug lies in its simplicity: every ingredient plays a crucial role in delivering the taste and texture of a classic chocolate chip cookie. From rich butter to melty chocolate chips, each component brings something special to your mug.

• Unsalted butter: Adds richness and gives your mug cookie that signature tender crumb.
• Light brown sugar: Contributes moisture and a deep, caramel-like sweetness.
• Granulated sugar: Gives structure and ensures the cookie has a balanced, classic sweetness.
• Vanilla extract: A dash of vanilla brings warmth and rounds out the flavors.
• Salt: Just a pinch heightens the other flavors and prevents the cookie from being too sweet.
• Egg yolk: Only the yolk is needed; it makes the cookie moist and chewy without turning cakey.
• All-purpose flour: Forms the backbone of your mug cookie, giving it body and texture.
• Semisweet chocolate chips: Classic chips melt slightly for pockets of gooey chocolate in every bite.

How to Make Cookie in a Mug

Step 1: Melt the Butter

Start by placing one tablespoon of unsalted butter straight into an 8-ounce microwave-safe mug. Microwave it for about 30 seconds, just until the butter is mostly melted. This step helps your sugars dissolve easily and ensures an even, buttery flavor throughout your Cookie in a Mug.

Step 2: Mix in Sugars, Vanilla, and Salt

Grab a spoon and stir in 4 teaspoons of packed light brown sugar, 1 tablespoon of granulated sugar, 1/4 teaspoon of vanilla extract, and a pinch of salt. Mix well until everything is evenly combined—the mixture should look glossy and smell like the beginnings of a real chocolate chip cookie!

Step 3: Add the Egg Yolk

Carefully separate one egg yolk (discard or save the white for another use) and stir it into the mug mixture. The yolk adds moisture and makes the cookie rich and chewy, rather than cakey. Keep stirring until the mixture is completely smooth and luscious.

Step 4: Fold in the Flour and Chocolate Chips

Measure out 3 tablespoons of all-purpose flour and gently fold it into your mug mixture until you no longer see streaks of flour. Then, add most of the 2 tablespoons of semisweet chocolate chips. Give it one last stir so the chips are well distributed, but hold back a few chips for a gooey topping.

Step 5: Top and Microwave

Sprinkle the reserved chocolate chips right on top of your batter to create tempting, melty spots once cooked. Pop your mug in the microwave and heat on high for 45 seconds to 1 minute. The cookie should puff up and look dry on the surface. Let it cool for a few minutes so you don’t burn your tongue—you want the Cookie in a Mug to be warm and gooey, not scorching!

How to Serve Cookie in a Mug

Garnishes

For the ultimate Cookie in a Mug experience, top it off with a big scoop of vanilla ice cream or a dollop of whipped cream. You can also add a drizzle of chocolate or caramel sauce, a few extra chocolate chips, or even a sprinkle of flaky sea salt for contrast—it all depends on what you’re craving in the moment.

Side Dishes

Since Cookie in a Mug is a rich little indulgence, serve it with a tall, cold glass of milk or a warm mug of coffee for a classic duo. For a cozy dessert spread, pair it with fresh berries, sliced bananas, or even an extra cookie if you’re sharing with a friend.

Creative Ways to Present

Elevate your Cookie in a Mug by serving it in your prettiest mug or a mason jar. Add a colorful paper straw, tie on a ribbon, or deliver mugs on a tray for a sweet midnight snack surprise. For a party, set out a bar with toppings and mugs, then let everyone customize their own cookie masterpiece.

Make Ahead and Storage

Storing Leftovers

If you somehow have leftover Cookie in a Mug (which, let’s be honest, is rare!), simply cover the mug with plastic wrap or foil and keep it at room temperature for up to 24 hours. The cookie may lose a bit of its fresh-from-the-microwave gooeyness, but it’s still a fantastic treat with your morning coffee.

Freezing

For future cravings, prepare the cookie dough in advance and freeze it right in a mug or in a small airtight container. When the urge strikes, let the dough come to room temperature, then pop it in the microwave. Freezing after cooking isn’t recommended since the texture is best enjoyed fresh and warm.

Reheating

To revive your Cookie in a Mug, microwave it on low for 10 to 15 seconds—just until it’s barely warm. Be gentle, since over-microwaving can dry out the cookie. If you’re feeling extra, add a scoop of ice cream right after reheating for bonus melty goodness!

FAQs

Can I use the whole egg instead of just the yolk?

For this recipe, only the egg yolk is needed for that classic chewy cookie texture. The egg white would add too much moisture and make your Cookie in a Mug more cake-like, so stick to just the yolk for best results.

What if I don’t have chocolate chips?

No chocolate chips? No problem! Chop up a chocolate bar, use white or dark chocolate chunks, or even add a swirl of peanut butter or a spoonful of Nutella for a delicious twist on your Cookie in a Mug.

Can I make this recipe gluten free?

Absolutely! Substitute a one-for-one gluten-free flour blend for the all-purpose flour. Your Cookie in a Mug will still be soft and satisfying, though the texture may be a touch different depending on your flour blend.

Why did my mug cookie turn out dry?

Dryness usually happens when it’s overcooked or not enough moisture is added. Every microwave is different, so start checking your Cookie in a Mug at 45 seconds. Make sure you use only the egg yolk—not the whole egg—for just the right amount of moisture.

Can I double the recipe?

Certainly! To make two servings, double all the ingredients and divide between two mugs or microwave-safe ramekins. Microwave them one at a time for the best results and enjoy Cookie in a Mug with a friend or loved one.

Final Thoughts

There’s a reason Cookie in a Mug wins hearts: it’s quick, delightfully decadent, and customizable to fit any craving. Next time your sweet tooth calls, don’t hesitate—pull out a mug, gather those simple ingredients, and treat yourself to the pure happiness of a gooey mug cookie in minutes!

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