Whisk the butter, brown sugar, lime juice, chili powder, cinnamon, and salt together in a small bowl.
¼ cup unsalted butter, 1 tablespoon lime juice, ¼ cup brown sugar, ¼ teaspoon chili powder, ¼ teaspoon ground cinnamon, ⅛ teaspoon kosher salt
Brush the mixture over the pineapple rings. Reserve any extra glaze.
1 pineapple
Grill the pineapple for 3 minutes per side.
Brush the remaining glaze on the pineapple before serving.
Notes
The rind of the pineapple should be yellow. If the rind is still green, then the pineapple is underripe, and if it is dark orange, it is overripe. The stem of a ripe pineapple should also smell sweet.
If using salted butter, omit the kosher salt.
Brush the grill grates with oil to prevent sticking.
It will take time to get good grill marks on your pineapple. Be patient, and don't flip too soon!
Storage: Store grilled pineapple in an airtight container in the refrigerator for up to 4 days.