Instructions

1. Preheat the oven to 375˚F, with one rack in the upper third and one in the lower third of the oven. Line two baking sheets with parchment paper and set aside.
2. In a small bowl, stir together flour, baking soda, and salt.
3. In a large bowl, combine the butter, peanut butter, brown sugar, and granulated sugar. Using a handheld electric mixer on medium speed, or a wooden spoon, vigorously beat the mixture until smooth.
4. Stir in the egg and vanilla.
5. Gradually stir in the flour mixture just until combined. Stir in the chocolate morsels.
6. Using a tablespoon, drop rounded dough portions onto the prepared baking sheets, about 2 inches apart.
7. Place one sheet on the upper rack and one on the lower; bake for 8 to 10 minutes until golden, switching the sheets top to bottom and from to back halfway through the baking time to ensure even baking.
8. Remove the cookies from the oven and let cool on the sheets for 5 minutes. Transfer the cookies to a wire rack to cool completely.
9. Store the cooled cookies at room temperature in an airtight container or ziplock bag for up to 3 days.