1. Preheat the oven to 350°F. Coat an 8\” x 8\” baking dish with cooking spray.

2. On a large sheet of waxed paper, combine the flour, baking soda, and salt. Stir with a fork.

3. In a mixing bowl, combine the peanut butter, sugar, and egg. Stir vigorously until creamy. Add the milk and vanilla. Stir until smooth. Add the flour mixture, stirring until well combined. Stir in the chips.

4. Dollop the dough into the baking dish and pat the top to smooth. Bake for about 15 minutes, or until slightly puffy and very lightly browned at the edges. Remove and allow to cool for at least 10 minutes before cutting. Store at room temperature, tightly covered with foil.