Grease the cookie sheet (if it is non-stick) with cooking spray or a thin layer of butter. Preheat the oven to 350 degrees Fahrenheit.
Put 1.25 cups of granulated sugar, 1 cup of softened utter and .75 cups of brown sugar into the mixing bowl.
Turn mixer on medium high and cream together the butter and sugar for about 2 minutes. It will be well combined and light and fluffy when done.
Put 2 eggs and 1 teaspoon of vanilla into the bowl and mix on medium for a minute or until it is well combined.
Combine 1.25 teaspoons baking soda, .25 teaspoons salt, 2.5 cups flour and .25 cup of cocoa powder in a separate bowl.
Turn the mixer on low and slowly add the flour mixture to the creamed butter, sugar and eggs. Mix just long enough so there are no streaks of flour left.
Add in food coloring. We used a tablespoon, but amounts will vary based on the type and brand of food coloring you use. So, start with a little and keep adding until you reach the desired color.
Crush Oreos with a rolling pin or wooden spoon in a ziplock bag. Then, add them to the dough and fold in well.
Scoop balls of dough with a tablespoon or cookie scoop. Each ball should be about 1.5 tablespoons.
Place balls of dough a few inches apart on the baking sheet. Press a few large Oreo chunks on the top of each ball of dough.
Bake at 350 degrees Fahrenheit for 12 minutes or until the edges are firm. Cookie centers will still be soft, but will firm as they cool.