Decorate cookies.
Single trees: Using decorating brush and lemon extract, outline shape of treetops on fondant. Add touches of orange, yellow and burgundy colors, blending slightly.
Double trees and leaves: Using decorating brush and desired colors, outline and blend in tops of trees and leaves.
Allow cookies to dry, about 10 minutes.
Using decorating brush and brown color, add trunks, veins and stems.
Let cookies dry completely.