Preheat the oven to 350°F. Spray muffin tins with non-stick cooking spray.
Open both cans of croissants and roll them out on a floured surface. Press down on the perforations to create two large sheets.
In a small bowl, microwave butter and peanut butter. Stir together. Spread a small amount of the melted butter/peanut butter on one layer of croissant dough. Sprinkle half of the chocolate chips.
Top with the second layer of croissant dough, peanut butter and chocolate chips.
Roll the dough up, similar to a cinnamon roll, then slice into 9 pieces. Place each roll in the prepared muffin tin.
Bake for approximately 20 minutes or until the cruffins are golden brown. Remove and let cool slightly before serving. Dust with powdered sugar, if desired.
Notes
These are best eaten the same day but can be stored in a tightly sealed container for up to 3 days. To soften, reheat in the microwave for a few seconds.