Ruthee's Irish Lace Cookies

1/2 cup unsalted butter -- plus extra
4 tablespoons flour -- plus extra
1 cup firmly packed brown sugar
1 tablespoon vanilla extract
2 tablespoons milk
1 cup old-fashioned rolled oats
 
1. Preheat oven to 350 degrees F. Grease and flour 2 baking sheets.
 
2. Cream butter and sugar. Add vanilla; stir in flour, milk, and rolled oats. Drop batter by the tablespoon onto prepared baking sheets; allow room for cookies to spread to about 3 inches in diameter. Each baking sheet will hold about 6 cookies.
 
3. Bake until cookies flatten and look dry (10 minutes). Let cookies cool for 4 to 5 minutes on baking sheets. Lift from baking sheet with a metal spatula and cool completely.

Makes 2 dozen cookies.