01 - Preheat oven to 350°F. Line baking sheets with parchment paper.
02 - Whisk together flour, baking soda, and salt in a medium bowl.
03 - Beat softened butter with granulated and brown sugars until light and fluffy.
04 - Mix in egg and vanilla extract until fully incorporated.
05 - Gradually add flour mixture to wet ingredients, mixing just until combined.
06 - Gently fold chopped chocolate sandwich cookies and white chocolate chips into dough.
07 - Drop tablespoon-sized dough balls onto prepared sheets, leaving 2 inches between each.
08 - Bake for 10-12 minutes until edges are lightly golden and centers set.
09 - Let cookies rest on baking sheets for 5 minutes, then transfer to wire rack to cool.