Bake at 170° for 5-8 minutes (our oven takes about 8 minutes, but I start checking a little before that), until the Kisses are starting to soften but not melted.

Remove the baking sheet from the oven, and quickly press an M&M candy into the center of each Kiss.

Allow them to cool on the pan for a few minutes, then stick the baking sheet in the freezer until the chocolate is set.