Heat oven to 400 degrees F. Mix thoroughly butter, shortening, sugar, orange peel and eggs.

Blend in flour. Color with green food coloring, if desired. Shape dough by rounded teaspoonfuls into ropes, each about 6 inches long and 1/4 inch in diameter.

Form each rope into a circle, bringing one end over the other and through into a single knot. Let about 1/2 inch extend at each end. Place on ungreased baking sheet.

Press in red cinnamon candies, if desired. Bake 10 to 12 minutes or until set but not brown. Immediately remove from baking sheet.