Nanny's Sugar Cookies

This is written on a browned piece of paper in my husband's grandmothers handwriting. No directions, just the ingredients. Also no flour. From reading several of her recipes, I've got the impression that flour is just added until it "seems" right. Nanny was born in 1887, these are very old recipes from people who just threw things together!!!

1 1/2 cups sugar

1 egg

1/2 cup butter

1/2 cup sweet milk

1 teas. soda

2 teas. crm tartar