Put chocolate chips and sweetened condensed milk in a large microwave safe bowl.

Microwave for 2 minutes.

Stir everything together.

Microwave for an additional 30 seconds if needed.

Stir in orange gel food coloring.

Stir in chopped Oreo pieces (you can reserve about 1/4 cup to put on top)

Pour fudge into a 7x11 (or 9x9) baking dish and spread evenly.

Press additional 1/4 cup Oreo cookie pieces on top of fudge.

Let fudge set at room temperature for a few hours till hardened, or in the fridge for about an hour.