Bake the cupcakes according to package directions. Cool completely.
Scoop frosting into large bowl, add several drops of green gel food coloring. Stir to combine. Continue adding food coloring 1-2 drops at a time, mixing well between each addition, until frosting reaches desired shade.
Add frosting to piping bag, cut 1' off from the tip, then attach star decorating tip.
Starting in the center of each cupcake, squeeze the frosting out through the tip and move in a circular pattern working out to the edge of the cupcake and back in towards the center moving up to form a tree.
Decorate with sprinkles.
Notes
Add Stars: Try adding a cute yellow star sprinkle as a tree topper on your Christmas tree cupcakes.
Short cut tip: Buying premade frosting makes this recipe super easy. Make sure that it is room temperature or whip it up for easier piping.
Variation tip: Melt candy melts and pipe on garland to your trees.
Alternate ingredient: Cut and invert a sugar cone on top of your cupcake and pipe the Christmas tree design on that.
Dietary consideration tip: Gluten free cake mixes are wonderful to use in this festive Christmas tree cupcakes recipe.
Pretzel Sticks: Can be used to create a tree trunk if you like. Coconut can be used to look like snow.