My kids and I made these this week and gave a few away to friends. It was a fun treat for them to help with.
Preheat oven to 225 degrees. Place the pretzel rings on a foil lined baking sheet. Put one Hershey's Kiss in the center of each pretzel ring. Bake for 4 minutes to soften the Kisses. Remove from oven and push an M&M into the center of each Kiss. Cool completely to harden. To speed up the process you can stick them in the refrigerator.