Pecan Bourbon Cling Peach Crisp

Preheat oven to 375 degrees (F). In a 10" to 12" cast iron skillet OR 9x13-inch baking dish, combine the peaches, bourbon, vanilla, brown sugar, cinnamon, and cornstarch. Toss well and set aside. For the Pecan Crisp Topping: In a large bowl, combine the oats, pecans, brown sugar, cinnamon, and flour. Add in the cubed butter. Using two forks or a pastry blender, cut the butter into the dry ingredients until the mixture resembles a coarse, crumbly texture. Sprinkle topping evenly over peaches and bake for 40 to 45 minutes, or until the topping is golden brown. Let cool for about 10 minutes, then serve warm with ice cream, if desired.