1. Sometimes the Peppermint Crunch Baking Chips can be elusive! Sometimes it's easier to find the Peppermint Crunch candies and chop them into bits yourself. I love the red and white in my holiday cookies but if you can't find them the regular Andes mint baking chips will work well. too. Also -- when in doubt, check Big Lots.
2. I've found that it's important to keep this cookie dough cool. If the dough gets too warm (like if your kitchen gets too warm while you're baking) the cookies spread out and are more crisp than chewy. I like to refrigerate the dough either in the bowl or portioned out onto the cookie sheet until ready to bake.