Food.com wasn't letting me import this recipe. This is my spin on the original. *** REMINDER the best mug cookies are recipes that have eggs in it! So don't expect heaven in a mug. BUT if you ever find yourself craving this but are out of eggs then this is your recipe! Place butter and milk in a coffee cup or mug. Microwave for 30 seconds to melt the butter and warm the milk. Stir in brown sugar and vanilla extract then mix in flour, chocolate chips and pinch of salt. Microwave for about 1 minute on HIGH. Allow to cool for 5 minutes before serving. This is the BEST thing ever. I'm always craving something sweet and baking a full sheet of cookies and/or a cake is too much. This is my favorite recipe because it has no egg! It's also pretty moist which I personally like but if it is too gooey try adding a few seconds until you find what works best for you! I use large oversized mugs so I can add a scoop of Buttercrunch Blue Bell Ice Cream.. Yummmm!