In a medium-sized bowl, combine the butter, brown sugar and white sugar.
Add in the flour (see notes section for how to use flour safely), if using, mix completely and adjust texture if needed with milk, 1 Tablespoon at a time.
Add vanilla extract and salt, combine, taste and adjust.
Add the chocolate chips and mix completely.
Refrigerate for at least 1 hour before enjoying.
Notes
Optional: 1/2 cup flour, for texture. Flour MUST be cooked in the microwave for 2 minutes or cooked in the oven at 350F for 10 minutes, stirring once halfway through, to kill any bacteria. I recommend leaving it out.