While the dough chills, peel, pit, and slice peaches about ½ inch thick.
3 pounds fresh peaches
Toss peach slices with brown sugar, flour, bourbon, vanilla extract, cinnamon, nutmeg, lemon juice, and sea salt until evenly coated.
3 tablespoons all-purpose flour, 1 tablespoon bourbon whiskey, 1 teaspoon vanilla extract, 1 teaspoon ground cinnamon, ½ teaspoon ground nutmeg, juice of one lemon, 1 pinch fine sea salt, ½ cup brown sugar
Melt butter in cast iron skillet over medium heat then add the peach mixture to the pan. Cook until bubbly and thickened, stirring as necessary (about 5-10 minutes). Remove from heat.
¼ cup unsalted butter
Preheat oven to 350 degrees. Roll out the chilled dough into a circle about ¼ inch and almost the same diameter of the skillet. Lay dough over top of peach filling.
Brush the dough with beaten egg then sprinkle with granulated sugar then transfer to oven.
1 egg, 1 teaspoon granulated sugar
Bake cobbler for about 30 minutes or until crust is golden brown and filling is thick and bubbling around the edges of the crust.
Allow cobbler to cool and set for about 45 minutes before serving.