Preheat the oven to 350°F. Line two large baking sheets with parchment paper and set aside. Chop up 3-4 of the Oreos and the mini chocolate chip cookies, then set aside. (Leave 10 of the Oreos whole to stuff in the cookies).

In the bowl of a handheld mixer or standing mixer with the paddle attachment, beat the butter and sugars together until light and fluffy (about 1-2 minutes). Mix in the egg, food coloring, and vanilla extract.

Add in the flour, salt, and baking soda, and mix until just combined (don't over-mix). Fold in the chocolate chips, chopped Oreos, and chopped mini chocolate chip cookies.

Scoop 10 heaping tablespoons of dough onto each baking sheet. They should be fairly big (these are monster sized cookies!). Press a whole Oreo cookie slightly into half the balls of dough, then top them with another heaping Tablespoon of dough to cover the Oreo completely. Then bake 5 assembled cookies on each baking sheet. The cookies will weigh around 3 oz once assembled.

Bake the cookies one tray at a time in the preheated oven for 8-10 minutes, until edges and top look set. Let cool on the baking sheet for 10 minutes, then transfer to a cooling rack to finish cooling.