Start by cutting off the top and bottom of the pineapple. Stand it upright and carefully slice off the skin, making sure to remove all the brown “eyes.”
Slice the 1 whole pineapple into rounds or wedges, based on your preference. Leave the core in for presentation when using rounds, or remove it with a small cookie cutter or knife before serving.
Preheat your Blackstone griddle to medium or medium-high heat, then lightly brush the surface with 2 tablespoons cooking oil.
In a large bowl, mix melted 2 tablespoons butter or oil with 2 tablespoons brown sugar, 1 teaspoon ground cinnamon, and 1/4 teaspoon kosher salt. Brush each pineapple slice or wedge generously on both sides with the mixture.
When the griddle is hot, place the pineapple slices on it. Cook 2–3 minutes per side, or until golden caramelization and grill marks appear, adjusting time for thickness and heat.
Once the pineapple slices are golden and caramelized, remove them from the griddle. For extra brightness, sprinkle with 1/4 teaspoon lime zest or 1/4 teaspoon lemon zest and garnish with fresh mint leaves. Serve warm, either on their own, alongside grilled meats, or topped with a scoop of vanilla ice cream for a sweet finish.