Heat treat the flour either by oven or microwave - See notes.
Cream butter and sugars. Butter should be room temperature.
Add in salt and vanilla
Add in flour and mix.
Slowly add in non-dairy milk until desired consistency. It’s important to note that the mixture will be dry and crumbly before you add the milk at the end. Be sure to add it slowly, just until the dough reaches your desired consistency.
Add in chocolate chips and combine.
Notes
How to heat treat flour:
Microwave: Place flour in a microwave safe bowl or dish. Heat for 30-45 seconds, up to 1 minute. Check the temperature of the flour using an instant read thermometer of 160F. After heat treating, if there are clumps of flour, be sure to run the flour through a sifter to help break up any clumps to prevent any lumps in your dough.
Oven: Preheat oven to 350F degrees. Spread the flour out onto a large baking sheet. Bake for about 5 minutes, making sure the flour is not browned or toasted looking. Ensure that the flour reached an internal temperature of 160F by using an instant read thermometer.