Cream together butter, granulated sugar, and brown sugar using an electric mixer for 1-2 minutes until smooth and fluffy.

Add egg, vanilla extract, and blue gel food coloring. Beat on low speed until well combined.

In a separate bowl, whisk together flour, baking powder, baking soda, and salt. Fold into wet ingredients until just combined.

Gently fold in chocolate chips, mini cookie pieces, and chopped Oreos until evenly distributed.

Shape about 2 tablespoons of dough around a whole Oreo.

Chill shaped cookie dough balls for 30 minutes in the refrigerator.

Preheat oven to 180°C (350°F). Bake for 12-15 minutes until edges are golden brown.

Cool on the tray for 5 minutes before transferring to a wire rack.