Melt the white candy melts in a bowl following the package directions until smooth and creamy.

Melt the green candy melts in a separate bowl until fully melted and soft.

Dip the bottom of each Oreo into the white candy melts so only the base is coated. Tap gently to remove any extra coating.

Place the coated Oreos on a plate or lined baking sheet.

Transfer the green candy melts into a piping bag.

Pipe the green candy over the top of each Oreo in a zigzag or tree pattern.

Add a star sprinkle to the top while the green coating is still soft.

Sprinkle nonpareils over the green frosting for ornaments.

Let the cookies set completely at room temperature or speed up the process by chilling in the fridge for 10 minutes.

Once firm, carefully remove the cookies and enjoy your festive creations.