Preheat oven to 400 degrees. Cream butter and sugar. Add egg and vanilla. Mix all dry ingredients and add to the creamed butter and sugar mixture. Roll out on lightly floured board to desired thickness. With pizza cutter or sharp knife, cut dough into 30 (4x1-inch) sticks. Bake 8 to 10 minutes or until edges are light golden brown. Cool 2 minutes. In small bowl, melt white chocolate as directed on packaging. Dip one end of each stick into chocolate; dip or sprinkle with assorted sprinkles.