In the bowl of a handheld mixer or standing mixer, beat the butter, brown sugar, and granulated sugar together until light and fluffy (2-3 minutes). Add in vanilla extract.
Add in the flour, salt, and cocoa powder and mix until just combined. Add in milk a little at a time then mix again. Add more milk as needed.
Stir in the chocolate chips and dig in!
Notes
Please Note: I highly recommend using a kitchen scale to weigh your dry ingredients. Metric measurements are found above under the "Metric" tab.Measuring Flour & Cocoa Powder: Properly measure your flour and cocoa powder using the scoop and level method or a kitchen scale. Too much flour will lead to dry, crumbly cookies.Mix-Ins: Feel free to add in other mix-ins if desired, like sprinkles, mini marshmallows, or chopped nuts.Storage & Freezing Instructions:The cookie dough should be stored in an airtight container in the fridge for up to 7 days. Leave at room temperature to thaw before enjoy.