Preheat oven to 350℉. Gather all your ingredients so that you have everything close at hand on the counter or table.
Prepare the Cookie Dough
In large mixing bowl, cream together 1 cup butter (softened), 1 cup creamy peanut butter, 1 cup granulated sugar, and 2/3 cups brown sugar. Add in 2 large eggs and 1 teaspoon vanilla extract. Mix to incorporate.
In a small bowl, mix together 2 cups all-purpose flour, 1 cup old-fashioned oats, 2 teaspoons baking soda, and 1/2 teaspoon salt.
Add flour to creamed mixture until combined. Stir in 2 cups semi-sweet chocolate chips.
Bake the Cookies
Drop by large spoonfuls onto baking sheets lined with parchment paper or silicone baking mats.
Bake in preheated oven for 10-12 minutes until golden brown. Makes 3 dozen cookies.
Notes
*Unless otherwise indicated, all butter used on this recipe site is salted.