Preheat your oven to 350°F (175°C). Line a muffin tin with cupcake liners and set aside.
In a large mixing bowl, combine the chocolate cake mix, vegetable oil, and eggs. Mix on medium speed until well blended. Gradually add the melted mint chip ice cream and mix until smooth and fluffy.
Spoon the cupcake batter into the prepared muffin tin, filling each liner about two-thirds full to allow room for rising.
Place the muffin tin in the oven and bake for 18-20 minutes, or until a toothpick inserted in the center comes out clean. Once done, remove from the oven and allow to cool in the pan for about 5 minutes before transferring the cupcakes to a cooling rack.
While the cupcakes cool, prepare your frosting. In a large mixing bowl, combine the vanilla frosting with a few drops of peppermint extract and green food coloring. Mix until the desired shade of green is achieved.
Once the cupcakes are completely cool, use a piping bag to frost each cupcake generously with the mint-flavored frosting.
Finish off each cupcake with a sprinkle of mini chocolate chips. This adds a delightful crunch and enhances the mint chip flavor.