Make cake batter according to package, color with orange food coloring, and bake cupcakes according to package directions.

After cupcakes completely cool, frost with orange buttercream.

While buttercream is still wet, dip into sanding sugar coating the entire frosting surface.

Break a pretzel rob in half and stick one half into the middle in the cupcake, broken side down.

Pipe green butter cream to make vines.