Mix in a mixer:
Add and mix in at medium speed, just until blended:
Add and mix in:
Drop by 1 Tbsp amounts onto prepared cookie sheets. Bake 8-9 minutes, until lightly browned.
You’ll want to toss your marshmallows in powdered sugar to keep them from sticking together. You can either: 1. Place cut marshmallows aside on a piece of parchment paper sprinkled with powdered sugar, then toss in a large Ziploc with some powdered sugar; or 2. Place directly into a large Ziploc with powdered sugar once cut, and toss occasionally while you're cutting so marshmallows don’t stick together.