2tablespoonsmilk chocolate chips, or dark chocolate
Instructions
In the microwave, melt the butter in an eight-ounce mug for 8-10 seconds. Carefully remove.
Mix in the brown sugar and salt (if using salted butter, you will not need as much salt).
Add the egg yolk to the sugar mixture and whisk until fully combined. Lastly, add the flour until no dry patches remain, being careful to not overmix.
Fold in the chocolate chips. Add more chocolate chips to the top of the batter if you would like.
Microwave for 35 - 40 seconds until the cake has risen and becomes fluffy. If the cookie is underdone, microwave it for 5-7 more seconds. It is better to undercook the cookie than overcook it. The texture should be soft and gooey in the center.
Serve with ice cream, caramel sauce, chocolate sauce, and much more!
If you've tried this recipe, come back and let us know how it was in the comments or ratings!