Cream together butter, sugar, and vanilla. Beat in egg, then stir in sesame seeds. Sift together dry ingredients; add to mixture and mix well. Drop in small, ball-like mounds about 3 inches apart in well-greased baking sheet. Bake at 375 degrees for 8 to 10 minutes (dough will spread, puff up while baking, then sink). Cool a minute before removing from sheet. Makes about 4 dozen thin, crisp cookies. TO TOAST SESAME SEEDS: Spread seeds in shallow pan and set in 375 degree oven until browned (8 to 10 minutes). Stir often. Reprinted with permission from _Brown Sugar Recipe Bonanza_ From the C and H Sugar Kitchen Electronic format by Karen Mintzias