I don't host Christmas but I am in charge of the cookies. My mom hosts a sit down for 20 or so family members. The traditional cookie flavors are: chocolate chip cookies, butter cookies, snickerdoodles, and Russian teacakes. When I married DH, I added chocolate-chip peanut butter pretzel cookies because they are his favorite. This is the first year that I am baking with a toddler so we will see how much gets done
My favorite is 7-layer cookie bars, I need to make them soon!
I tend to make peanut blossoms, iced sugar cookies, some kind of fudge (Bailey's is a favorite), cinnamon almonds, and marshmallows. Then if I get a request or a craving I'll make another kind.