Place popcorn in large bowl; set aside. In medium saucepan on low heat, melt chocolate chips and coconut oil. Stir until blended. Being careful to hold the hot saucepan away from you, pour the melted chocolate and oil over popcorn. Then stir until well-coated. Stir in chopped Oreos.
Spread mixture on baking sheet and chill in the refrigerator until chocolate has set. Break into pieces. For extra visual punch, place pieces into pretty party cups and serve.