Butter Cookies

1 cup butter, softened
1/2 cup brown sugar
1 cup sugar, plus more for flattening each cookie
1 egg
2 tsp vanilla
1 1/4 cups flour, sifted
1/2 tsp salt
1 tsp cinnamon
2-1/2 cups quick cooking oatmeal

In a large bowl, beat the butter until smooth. Add both kinds of sugars, beating until fluffy. Beat in the eggs and vanilla, then add the flour, salt, cinnamon, and oatmeal. Cover the bowl and chill the dough in the refrigerator until it is firm.
Preheat the oven to 325. Shape the dough into marble-sized balls and place on ungreased cookie sheets.
Flatten each cookie with the bottom of a drinking glass dipped into granulated sugar. Dip the glass into sugar between each cookie to re-sugar the glass.
Bake the cookies for 12 to 15 min or until the cookies are just set and turn light golden brown. Cool the cookies on the cookie sheets for about a minute, then remove to wire racks to cool. Makes 3 dozen