In a microwave safe bowl, melt chocolate chips; stir until smooth.
Spread the flat side of each kiss with a small amount of melted chocolate; immediately attach to a cookie. Repeat with remaining cookies.
Cut a small hole in the corner of a pastry or plastic bag; insert a small round tip. Fill with remaining melted chocolate. Pipe a small dot of chocolate onto each acorn and add a chocolate chip for the stem.
Place on waxed paper-lined baking sheets; refrigerate until set. Store in an airtight container.