Preheat oven to 275 degrees.
Spread the pretzels out on a cookie sheet and place one Hershey's Kiss on top of each pretzel.
Place sheet in the oven at 275 degrees for 3 minutes - just long enough for the Kisses to get soft.
Remove from oven and immediately press a single M&M on each.
Refrigerate until eating to make sure they are deliciously solid.