I make these every Christmas and whenever possible in between.
Cream:
1 c butter
8 oz cream cheese (softened)
1 cup sugar
Add:
2 eggs
2 t grated orange rind
2 t vanilla
Stir in:
2 1/4 c flour
1 t salt
an appropriate amount of chocolate chips
Chill for at least an hour
Bake at 350 degrees for 8-10 minutes