In a large pot, combine 4 cups of apple cider with the kosher salt and sugar over medium-high heat. Stir until the salt and sugar dissolve fully, then remove from heat. Add ice cubes, chopped celery, half of the orange slices, onion chunks, smashed juniper berries, thyme sprigs, and bay leaves, stirring to mix.
5 cups apple cider, 1 cup kosher salt, ½ cup sugar, 4 cups ice cubes, 4 stalks celery, 4 oranges, 1 large onion, ⅓ cup whole juniper berries, 6 sprigs fresh thyme, 4 bay leaves
Place the turkey in a large container and pour in the cider mixture, along with the remaining apple cider, cold water, and white wine. Make sure the turkey is fully submerged; add more water if needed. Cover and refrigerate for at least 24 hours (up to 48 hours) to let the turkey absorb all that flavor.
1 turkey, 2 gallons cold water, 2 cups dry white wine
When ready to cook, preheat the oven to 428°F (220°C). Take the turkey out of the brine, pat it dry, and trim off any excess fat. Using kitchen shears, cut along both sides of the backbone to remove it, then cut through the center Y-bone. Press down firmly to flatten the turkey, spreading the thighs out and tucking the wings under.
Line a roasting pan with the remaining orange slices and place the turkey on top. Roast in the preheated oven for 1 ½ to 2 hours, or until the skin is crispy and golden brown. Let the turkey rest for 20 minutes before carving.
Serve with herbs and mashed potatoes.
Mashed potatoes, Herbs