Mix the cake mix according to the package instructions.
Place the mini cones in a mini muffin tin. Fill the cones ¾ way up with the cake batter. Bake at 350 degrees for 12 minutes. Then cool completely.
In the stand mixer bowl with the paddle attachment, add the butter and shortening. Cream together until blended and smooth.
Add the powdered sugar one cup at a time. Mix on low speed until all sugar has been incorporated.
Add the vanilla, salt, and milk, and mix on low for 10 minutes to get a perfectly smooth frosting. (See Note)
Mix in the green gel food coloring until you get the desired green color. Set aside.
Dip the lollipop stick into the frosting. Then insert it in the center of the cone. This helps the lollipop stick stay in place without falling out.
Add the green frosting into a pipping bag fitted with a grass tip (Wilton #233). Pipe a little frosting on top of the cone and put a peppermint kiss on top.
Pipe the frosting along the bottom of the cone making sure to fill all the space, then slowly pull away from the cone. (See note)
Continue to pipe along the cone, while turning to cover the entire cone and peppermint kiss. (See note)
Add the sprinkles and decorations over the frosting. Time to enjoy!