In a pot, melt butter on low heat.
Stir in the peppermint extract and food coloring. (I start out with just a few drops of food coloring and add more in a later step, if needed).
Add in the marshmallows and stir. You want to cover all the marshmallows with the melted butter. They should create a big, melted blob. At this point, add more food coloring if the color isn't right.
Once you've reached the right color and everything is melted, add in the edamame puffs. Mix well; it takes awhile to get everything well mixed and covered (you can usually turn the heat off for this step).
Dump the mixture into a 9x9" square dish and smooth them out.
While they cool - in a small microwave safe bowl, microwave the chocolate chips and coconut oil for 30 seconds. Remove and stir, microwave in 20 - 30 second increments (to avoid burning), stirring in between until completely melted. For reference, it only took about 60 secs when I did it.
Add the melted chocolate on top of the crispy treats. I attempted a cute drizzle that did not turn out cute; you could also just evenly spread it over the treats so that it doesn't look like a failed art project!
Throw them in the freezer for 10 - 15 minutes, or until the chocolate topping hardens and then you can remove them!
I would probably let them get to room temp before you attempt to eat them.