In a heavy saucepan, melt chocolate chips and butter over low heat, stirring frequently. Be sure to stir often enough to keep the chocolate from clumping or burning.
Remove the mixture from the heat and let it cool for up to 10 minutes, so it doesn’t melt the marshmallows.
While chocolate is cooling, prepare the rolling station by laying out 2 large pieces of parchment or wax paper on a working surface and evenly spread 1 cup of coconut.
In a large bowl, mix the marshmallows and nuts.
Add melted, warm chocolate over marshmallow mixture and stir to combine well.
Divide the mixture in half and place on top of the coconut on parchment paper.
Shape into logs and roll up tightly in the paper. Twist ends tightly.
Refrigerate for 2-4 hours or until firm enough to cut. To save time, you can also freeze them for about 15 minutes to get a clean cut.
Slice into ¼ inch thick cookies.
Store the cookies in an airtight container in a single layer with parchment paper separating layers. You can also store them in the fridge.