Freeze Oreo pieces for 10 minutes.
Preheat oven to 350°F. Line a sheet pan with parchment.
Cream butter and both sugars until lightened.
Mix in egg and vanilla.
Add flour, baking soda, and salt. Stir until just combined.
Fold in chocolate chips, then frozen Oreo pieces in 6–8 strokes.
Scoop into 1 1/2-tablespoon portions, spaced 2 inches apart.
Bake 10–12 minutes until edges are golden. Cool on pan 5 minutes.
For the best oreo chocolate chip cookies, freeze your Oreo chunks for 10 minutes before folding them into the dough—this keeps the cookies loaded with crunchy Oreo pieces. Want thicker cookies? Chill the dough for 20–30 minutes before baking.