Spread a layer of white frosting on top of each cupcake. Set them aside.
Use a butter knife or small spatula to spread green frosting around each sugar cone, but don’t cover the very top. Leave a small space so you can hold the cone without getting messy.
Carefully place each frosted cone upside down on top of a frosted cupcake. The green cone should look like a tree sitting on top of snow.
Fill a piping bag with green frosting and use a grass tip (#233) to pipe frosting around the cone. Start at the bottom and work your way up. If you don’t have a grass tip, a star tip will work as well.
Add white pearl sprinkles to look like ornaments and place a gold star on top of each tree.
Repeat for the rest of the cupcakes, then serve and enjoy your cute Christmas tree treats!