My best tip... Don't add the M&M's, Sixlets, Reese's Pieces and other candies with a hard shell until after the cookies are done baking.
I just poke them into the top of the hot cookie, that way the candy stays shiny and doesn't crack from the heat of the oven.
I just poke them into the top of the hot cookie, that way the candy stays shiny and doesn't crack from the heat of the oven.