Warm, gooey cookies in just six minutes? These Hot Chocolate Mug Cookies for Two are the ultimate cozy treat. Perfectly portioned and ready in a flash, they combine rich cocoa, melty chocolate chunks, and a soft, fudgy center. The aroma alone will make your kitchen feel like a winter wonderland, while the quick prep and microwave bake make them ideal for spontaneous cravings or a sweet midnight snack.

Each bite delivers a delightful contrast of textures—crisp edges giving way to a lusciously tender middle. The deep chocolate flavor is enhanced by a hint of warmth, making these cookies feel indulgent yet effortless. Whether you’re sharing with someone special or savoring solo, this recipe is your shortcut to instant comfort and joy.

What You’ll Need

2 tablespoons (1 oz/30g) butter (unsalted, melted)
2 tablespoons brown sugar (light or dark, packed)
2 tablespoons white sugar
2 egg yolks (large, room temperature)
4 teaspoons cocoa powder (unsweetened)
2 tablespoons flour (all-purpose)
Pinch of salt
Mini marshmallows (for topping, optional but recommended)

How to Make It

Melt the butter: Place the butter in a microwave-safe mug and microwave for about 30 seconds, or until fully melted.
Mix the sugars: Add both the brown and white sugars to the melted butter. Stir until well combined.
Add the egg yolks: Mix in the egg yolks thoroughly until the mixture is smooth and uniform.
Combine dry ingredients: Add the flour, cocoa powder, and a pinch of salt. Stir until the batter is fully combined and no dry spots remain.
Divide the batter: Split the mixture evenly between two microwave-safe mugs.
Cook: Microwave each mug separately for about 45 seconds to 1 minute. (Timing may vary based on microwave wattage—start with 45 seconds and check for doneness. The cookies should be set but still soft.)
Top and serve: Add a few mini marshmallows on top of each cookie. For an extra treat, microwave the marshmallows for 15 seconds to puff them up. Enjoy warm!

Perfect Pairings: Toppings and Add-Ons

Take your Hot Chocolate Mug Cookies to the next level with fun toppings! Try adding a dollop of whipped cream, a drizzle of caramel sauce, or a sprinkle of crushed peppermint for a festive twist. For a nutty crunch, toss in a few chopped hazelnuts or almonds. Pro tip: If you’re a chocolate lover, shave some dark chocolate on top for an extra indulgent treat.

Microwave Magic: Equipment Tips

Since this recipe relies on your microwave, it’s important to know its wattage. Most microwaves range from 800W to 1200W, so adjust the cooking time accordingly. If your microwave is less powerful, add 10-15 seconds, and if it’s more powerful, reduce the time slightly. Always keep an eye on the cookies to avoid overcooking! Use microwave-safe mugs for the best results.

Quick Fixes: Time-Saving Hacks

Short on time? Prep your dry ingredients (flour, cocoa powder, and salt) in advance and store them in a small container. When you’re ready to bake, just add the wet ingredients and mix! You can also melt the butter in the mug while measuring out the sugars to save a few extra seconds. Bonus: Double the recipe and store the extra batter in the fridge for a quick treat later!

Sweet Variations: Recipe Twists

Switch things up by adding a teaspoon of instant coffee for a mocha flavor or a dash of cinnamon for a warm, spiced kick. If you’re feeling adventurous, swap the cocoa powder for peanut butter powder for a nutty twist. Don’t forget to adjust the cooking time slightly if you change the ingredients!

Leftover Love: Storage and Reheating

If you have leftover batter, cover it tightly and store it in the fridge for up to 24 hours. When you’re ready to enjoy, give it a quick stir and microwave as usual. For reheating baked cookies, pop them in the microwave for 10-15 seconds to warm them up. Note: Freshly baked is always best, so try to enjoy them right away!