Melt butter and marshmallows; stir until smooth. In a large bowl, mix rice cereal, candy hearts (spiced tiny red ones) and miniature chips together.

To marshmallow mixture, blend in 2 drops red food coloring, adding more coloring if necessary to reach desired shade. Add marshmallow mixture to cereal mixture; stir quickly to combine.

Spread on a large buttered pan; press with buttered hands. While warm, press on candy heart (with messages) spaced 1 to 1/2-2 inches apart. Refrigerate and cut into squares.