Preheat the oven to 375 degrees F (190 degrees C).
2
Roll out puff pastry on a lightly floured surface to ¼-inch thickness; place in refrigerator.
3
Melt butter in a 9-inch cast-iron skillet over medium heat; add brown sugar, cinnamon, and nutmeg. Cook and stir until sugar dissolves, about 5 minutes. Stir in maple syrup; cook and stir until begins to bubble. Remove skillet from heat.
