Beat softened butter in a small bowl on medium speed for 30 seconds. Add granulated sugar and beat until combined. Beat in light cream. Add all-purpose flour and beat until smooth. Divide dough into 2 to 3 portions. Color each portion with paste food coloring.
Place each color in a decorating bag fitted with a writing, rose, or star tip. The dough must be stiff for the designs to hold their shape, so don't be tempted to add liquid. Pipe one color on all the sugar cookie cutouts on the cookie sheet, then do the same with the second color, then with a third, if desired. Bake as recipe directs. Once baked, the piped-on designs are durable and the cookies store and freeze well.