Preheat oven to 400°F (200°C).
Scrub sweet potatoes clean; do not peel.
Place potatoes directly on oven rack with a baking sheet below to catch drips.
Roast 45-50 minutes until fork-tender. Cool 5 minutes.
Cut each potato in half lengthwise. Scoop flesh into a bowl, leaving 1/4 inch attached to skins.
Add butter, cream cheese, maple syrup, paprika, cinnamon, coriander, salt, cayenne, and nutmeg to the bowl.
Mash until smooth and well combined. Taste and adjust salt if needed.
Spoon filling back into each potato half, mounding slightly. Arrange in a baking dish skin-side down.
Bake at 400°F (200°C) for 15-20 minutes until golden and crispy at edges.
Let rest 2-3 minutes before serving.