1-First Step: Melt the Butter Start by placing 1 tablespoon of unsalted butter into your microwave-safe mug. Pop it in the microwave for 30 seconds until it’s mostly melted; this creates the creamy base for your Cookie In A Mug. Stir it gently to ensure it’s smooth, which helps mix in the other flavors easily. If your microwave varies, keep an eye on it to prevent any overflow.

2-Second Step: Mix in the Sugars and Flavors Next, add 4 teaspoons of packed light brown sugar, 1 tablespoon of granulated sugar, ¼ teaspoon of vanilla extract, and a pinch of salt to the melted butter. Stir everything until it’s fully combined; this step builds the sweet foundation of your Cookie In A Mug. The sugars dissolve nicely, giving that signature cookie taste, and you can adapt this for dietary preferences by using a sugar alternative if needed.

3-Third Step: Add the Egg Yolk Now, stir in 1 egg yolk until the mixture turns smooth and creamy; this binds everything together for a great texture in your Cookie In A Mug. Be sure to use just the yolk for a softer result, as the whole egg might make it tougher. If you’re making a vegan version, swap in mashed banana here to keep things simple and adaptable.

4-Fourth Step: Incorporate the Flour and Chocolate Chips Mix in 3 tablespoons of all-purpose flour along with most of the 2 tablespoons of semisweet chocolate chips until just combined; overmixing can lead to a tough cookie, so go easy. This step forms the dough, and for gluten-free options, use a blend to maintain that fluffy feel. Sprinkle the remaining chocolate chips on top for an extra burst of flavor in your Cookie In A Mug.

5-Fifth Step: Microwave to Perfection Microwave on high for 45 seconds to 1 minute, watching closely until the dough puffs up and looks dry on top; timing is crucial to avoid overcooking. Every microwave differs, so start with 45 seconds and add more in short bursts if needed. This makes your Cookie In A Mug gooey inside, and you can adjust for low-calorie versions by reducing cook time slightly.

6-Final Step: Cool and Serve Let your Cookie In A Mug cool for a few minutes right in the mug before digging in; this helps it set without burning your mouth. It’s best enjoyed warm, perhaps with a scoop of ice cream for added fun. For variations, try different chips or toppings to make it your own while keeping the core of this Cookie In A Mug intact.