Preheat oven to 375F. Remove wrappers from milk chocolate mini Kisses or mini Reese's peanut butter cups. Beat sweeten condensed milk and peanut butter in a large mixing bowl until smooth, add biscuit mix and vanilla, blend well. Shape in 1" balls & roll in sugar. Place 2" apart on a cookie sheet or use a muffin pan with paper liner. Bake in oven for 6 - 8 minutes or until lightly browned (do not over bake). Remove from oven, immediately press in mini kisses or Reese's in center of each ball. Remove cookies to a wire rack to cool. Cool completely. Store in air tight container. Makes 48 cookies approx.