Heat-treat the flour (important for safety): Preheat oven to 350°F (175°C). Spread flour on a baking sheet and bake for 5–7 minutes until it reaches 160°F internally (use a thermometer if possible). Let cool completely. (Microwave alternative: Heat in 30-second bursts, stirring between, until 160°F.)
Cream the butter and sugars: In a bowl, beat softened butter, brown sugar, and granulated sugar with a mixer (or by hand) until light and fluffy (2–3 minutes).
Add wet ingredients: Mix in vanilla, salt, and 2 tablespoons milk until smooth. Add more milk if needed for desired consistency.
Incorporate dry: Stir in the cooled heat-treated flour until just combined.
Fold in chocolate chips: Gently mix in the chips by hand.
Enjoy: Eat immediately, chill for firmer texture, or roll into balls!