Put the butter into your mug and melt it in the microwave. This will take about 20-30 seconds depending on how cold your butter is. It's fine if the butter is not 100% melted.
Add the rest of the ingredients and stir well to combine.
Microwave for one minute. When fully cooked the cookie should look set and not shiny, but still slightly soft in the center. The center will continue to cook slightly as it cools. You may need to adjust the exact time for your specific mug and microwave, so it may take an experiment cookie or two to get it right.
Once you've determined the exact time for you, note it in the personal notes section, below.
Plan to enjoy your cookie in a mug right away, it will not keep or reheat well.
Notes
*You'll get different results using liquid dairy vs egg yolk:
If you use milk or Half & Half:
you will get a soft plush cookie in a mug, spoonable and incrediblly delicious. Think warm cookie, right out of the oven (like Crumbl!)
If you use egg yolk:
your cookie will have more texture and crunch to it. Still spoon-able, but definitely a crunch factor. I'm not promising you'll get a Thin and Crispy Chocolate Chip Cookie from your microwave, but it definitely gives cookie vibes rather than soft blondie.
Nutritional information is provided as a courtesy and is an estimate only. This information comes from online calculators. Although The View from Great Island attempts to provide accurate nutritional information, these figures are only estimates.
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