Start by placing 24 ounces of Green Candy Melts into a microwave-safe bowl. Heat them on high for about 1 minute, then stir and return to the microwave, heating in 15-second bursts at 50% power until smooth and fully melted.

Once the candy melts are smooth, add in the 14-ounce can of sweetened condensed milk along with 3 tablespoons of Creme de Menthe. Stir vigorously until the mixture resembles thick, rich fudge.

Cover the fudge mixture with plastic wrap and allow it to cool at room temperature. Stir every 5 minutes for about 20–30 minutes until it thickens to an easy-to-pipe frosting-like consistency.

Prepare a pastry bag by fitting it with a star tip. Once the fudge has thickened, fill the bag with the fudge mixture. Pipe tree shapes onto a parchment-lined baking sheet.

Add visual flair by placing a gold star sprinkle atop each tree. Then, sprinkle rainbow nonpareils around the base for colorful decoration. Allow the fudge to set at room temperature until firm.