Cooking and baking is the stuff of the season - especially baking, at least here in Germany, where Christmas Cookies are still the Thing. I remember my gran on my dad's side bake a lot of different cookies each year, and those were a highlight in my childhood days - so much so that I feel the need to carry on that tradition, every year. (My other gran, though she had a lot of recipes that she made, is very much associated in my brain with a special kind of potato salad, by the way.)
Grandmothers are sort of pre-destined to be the source of recipes traded on in a family. In case you have not enough granny recipes from your own family, or from the grandmas of friends, here's a very interesting site for you: The Grandmas Project. This is a collection of films made by the grandchildren of their grandmother sharing (and making) a recipe. I really like this idea - and they are open to contributions, too!
(The potato salad, though, will not go in there. Although my gran is still alive and recently celebrated her 100th birthday, she has stopped cooking a while ago - her eyesight is almost gone...)