Preheat your oven to 350°F (175°C) and line two cookie sheets with parchment paper.

In a large mixing bowl, cream softened unsalted butter and peanut butter with brown sugar and granulated sugar for about 2-3 minutes.

Add in the large eggs, vanilla extract, milk, baking soda, and salt. Mix on low speed until well combined.

Gradually incorporate all-purpose flour into your batter, mixing until just combined. Fold in the Reese’s Peanut Butter Chips and optional chopped peanuts.

Using a ¼ cup measuring scoop, portion out the cookie dough and place them on your prepared baking sheets, spaced 4 inches apart. Press down to create a crisscross pattern on top.

Bake for 15-18 minutes until light golden around the edges and just set in the center.

Allow the cookies to cool on the baking sheets for a few minutes before transferring them to a wire rack.