One of Mom's favorite cookies to make were Holland Butter Cookies -- when asked what she was making for a dessert, she would say "Hollands". I also make these for Christmas, although we finished most of them off before Christmas day. They are simple to make and taste good -- two key criteria for most of us.
Cream: 1 cup butter and 3/4 cup sugar
Add the following and mix until it doesn't stick to the bowl:
1 egg yolk beaten
2 cups sifted flour
1 tsp. vanilla
Press on cookie sheet to 1/4 inch thickness. Scatter nuts (3/4 cup chopped nuts) on top and press lightly into dough. Bake in 300 degree overn until light brown (bake longer than most cookies). Let cool a few minutes and cut into squares (do not let cool too much before cutting).
For Christmas, Mom sometimes used used red and green sprinkles instead of the nuts for a festive touch.