Preheat oven to 350°F and line 2 large baking sheets with parchment paper.
Mix the cookie mix, egg, melted butter, and blue food coloring in a large bowl until a thick, blue dough forms. Add more coloring, if needed, until the dough reaches your desired color.
17.5 ounces sugar cookie mix, 1 large egg, ½ cup salted butter, 1-2 drops blue gel food coloring
Fold in the white chocolate chips, dark chocolate chips, crushed Oreos, and chocolate chip cookies. Stir the dough well so that the add-ins are evenly distributed throughout the dough. Use your clean hands to knead the dough a few times so that everything is well dispersed.
¼ cup white chocolate chips, ¼ cup dark chocolate chips, ½ cup crushed Oreo cookies, ½ cup crushed chocolate chip cookies
Using a 1½ inch cookie scoop, scoop out dough balls and place them on the prepared baking sheets.
Add extra chips, cookie pieces, and candy eyes if desired, and then bake for 7-11 minutes or until the cookies are set but still soft and the edges are just beginning to brown.
Candy eyes
Allow to cool for at least 5 minutes before removing from the baking sheet.
Serve warm or at room temperature.