Instructions: Heat oven to 350 degrees F. In large bowl, combine butter and brown sugar; blend until light and fluffy. Add egg yolk and vanilla; stir until well blended.

Lightly spoon flour into measuring cup; level off. Add flour; stir until mixture forms a smooth dough. Drop by 1 inch rounded teaspoonfuls onto ungreased cookie sheet. Bake at 350 degrees F. for 12 to 15 minutes or until lightly browned and set. Serve warm or cool.

Yield: 4 dozen

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