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

In a large bowl, cream butter, granulated sugar, and brown sugar until light and fluffy.

Beat in eggs one at a time, then add vanilla extract and blue food coloring. Mix until color is evenly distributed.

In a separate bowl, whisk flour, baking soda, baking powder, and salt. Gradually add dry ingredients to the wet mixture, blending until just combined.

Scoop rounded tablespoons of dough onto baking sheets, spacing 2 inches apart. Top each cookie with crushed mini Oreos, crushed chocolate chip cookies, and googly eyes.

Bake for 10–12 minutes, until edges are set but centers remain slightly underbaked. Cool on the baking sheet for 5 minutes, then transfer to a wire rack.