Juicy peach crisp with a golden, crumbly topping celebrates summer fruit in a warm, comforting family dessert. This easy, rustic dish is wonderful served warm with whipped cream or ice cream.
Preheat the oven to 350°F (175°C) and lightly grease a 9x13-inch baking dish for even cooking.
In a large bowl, gently toss sliced peaches with 1/2 cup granulated sugar, 1 tablespoon lemon juice, 1 teaspoon vanilla extract, and 1/4 teaspoon salt; spread the mixture evenly in the baking dish.
Combine the rolled oats, flour, brown sugar, 1 teaspoon cinnamon, and cold, diced butter in another bowl; use your fingertips or a pastry cutter to work the butter into the dry ingredients until the mixture resembles coarse crumbs.
Sprinkle the oat mixture evenly over the peaches, making sure to cover all the fruit for a crisp, golden topping.
Bake uncovered for 40–45 minutes or until the top is golden brown and bubbly juices are visible around the edges; let cool for at least 15 minutes to set the topping before serving warm.