Preheat and Prep the Grill: Fire up your grill to medium-high heat, aiming for about 375-400°F. You want the grates hot enough to sear the peaches but not screaming hot that they burn instantly. Clean the grates well and lightly oil them with a paper towel dipped in vegetable oil to prevent sticking. If you’re using a charcoal grill, let the coals burn down until they’re covered with white ash for the perfect even heat.
Make the Crisp Topping: In a medium bowl, combine the rolled oats, flour, brown sugar, cinnamon, nutmeg, and salt. Add the cold butter cubes and use your fingertips or a pastry cutter to work the butter into the dry ingredients until the mixture looks like coarse crumbs. This is the dessert that changes how you think about summer baking. You get the deep, smoky caramelization from the grill that you just cannot replicate in an oven. The peaches become jammy and soft, with those gorgeous char marks that taste like pure nostalgia.
Prepare the Grilled Peaches: In a medium bowl, combine the sliced peaches, melted butter, brown sugar, vanilla extract, cinnamon, and salt. Toss to coat the peaches evenly. Heat the grill to medium-high, then place the peach halves on the grill. Grill for about 4 minutes on each side, or until the peaches are tender and caramelized, with beautiful char marks.
Combine the Toppings: On a separate, clean plate, combine the crumbled oat mixture and chopped nuts (if using).
Serve: Serve the warm peach halves with the crumbled oat topping and garnish with chopped fresh mint leaves, if desired. This dessert feels fancy without requiring any special skills—just a grill and some ripe peaches. It comes together in about half an hour, keeps your kitchen cool, and looks absolutely stunning when you bring it to the table. Plus, it feels fancy without requiring any special skills—just a grill and some ripe peaches.
Pair it with vanilla ice cream or whipped cream for a delicious and refreshing dessert. Enjoy!