For the filling: combine 1/4 cup butter, powdered sugar, and vanilla extract and cream with an electric mixer until smooth and fluffy. Add red and green food coloring, if desired.
For the wafers: Preheat oven to 375 degrees. In a bowl using a pastry cutter, mix butter, whipping cream and flour thoroughly. Wrap dough and chill 2 hours.
Divide dough into 3 parts. On a lightly floured surface, roll 1 part of dough out to about 1/8-inch thickness. Cut into ½-inch rounds. Keep remaining dough chilled until ready to use.
Place cookies on ungreased baking sheet and sprinkle tops with sugar. Prick cookies with fork about 4 times. Bake in preheated oven for 7 to 9 minutes, or just until set, but NOT brown. Cool cookies completely on wire racks.
Spread Creamy Filling on non-sugared side one cookie and top it with another cookie, placing the non-sugared side of cookie on filling. If filling is too thick to spread easily, it can be thinned with a tiny bit of milk. Makes about 2½ dozen cookie sandwiches. Enjoy!