In a large mixing bowl, cream together the butter, brown sugar and sugar with an electric mixer on medium speed until light and fluffy. Add egg and vanilla and beat until mixed well. Do not over mix. Drop dough by heaping tablespoonfuls 2 inches apart onto prepared baking sheets and flatten mounds slightly with the bottom of a glass that has been dipped in sugar. Bake cookies in upper level of oven, switching position of sheets halfway through baking to ensure even browning, for about 10 to 12 minutes or until lightly browned.
Transfer cookies to wire racks to cool.
Makes 2 dozen cookies. All rights reserved.