Cut a small stack of 1 ½-inch waxed paper squares. Put a little frosting on a rose nail (or a meat thermometer) and place a waxed paper square on the frosting. Put the desired color of frosting in a piping bag fitted with a rose tip.
Always holding the wide side of the tip down, make a small cone in the middle of the paper, turning the stem of the rose nail as you work.
Add 3 petals, squeezing the bag and overlapping the petals a little.
Add another layer of 5 petals, staggering the beginning of the second row of petals so they are in between the first row (like laying bricks.)
Add another layer if you wish.
Slide the waxed paper and rose onto a flat surface.