Freehand outline, cut with scissors from black card, and pieces glued down, collage-style, onto A4 white card, to enhance the face's axis of symmetry. This cutting style is called Notan.
People liked my giraffe finger puppet a few weeks ago, so here's a zebra. Cut from two pieces of watercolour paper, markings drawn with a black "Stain" Sharpie. One finger is draped in thin black cloth and becomes the nose:
Pygar, the blind angel from Barbarella. Black Artline marker and white Signo pigment ink on watercolour paper, with real feathers collaged onto black card: