Add a little red food coloring to the marshmallows when making your basic crispy treats and stir until you get the desired pink color. Let the treats cool 10 minutes, cut out the hearts (about 35) and insert a lollipop stick in each.
After you cut out the hearts, roll the brownie leftovers into bite-size morsels. Once coated with cocoa or sugar, they resemble truffles. You'll get about 44 bites. Awesome use of those leftover food bits so I don't feel guilty using the cute cookie cutters!