Mix butter, both sugars (not coloured), and flour together.
Work well with hands until it will hold together.
Make 4 rolls about 1 1/2" in diameter, wrap, and chill for at least 6 hours.
Slice 1/4" thick and arrange on a parchment paper lined cookie sheet.
Sprinkle cookies with sugar, if desired.
Bake cookies in a preheated 350* oven for 10-15 minutes until very lightly burned around the edges.
Remove to wire rack to cool.
Enjoy!
