Preheat your oven to 350 degrees Fahrenheit (175 degrees Celsius).
Bring a large pot of water to a boil over high heat. Set out a large bowl of ice water. Use a sharp knife to score the bottom of the peaches with a large “x,” then place them in the boiling water for 30 seconds. Remove, and plunge immediately into the ice bath. Let sit for another 30 seconds, then place on a cutting board to rest for a few minutes. Starting at the bottom of the peach, use your fingers to peel back the skin by tugging on the corners of the pre-scored “x.” Once peeled, discard the skins and thinly slice the peaches.
Place the cinnamon, ginger, cardamom, cloves, and coriander into a large blender. Add 1/3 cup sugar, eggs, vanilla, salt, flour, and milk and blend until smooth.
Grease a 9-10 inch cast iron skillet with butter and pour in a 1/4 inch layer of the batter. Bake for about 2-3 minutes or until a film of batter just barely sets in the pan. The rest of the batter will still be raw.
Remove from the heat and keep the oven on. Lay the sliced peaches over the batter in a circular design. Sprinkle the remaining 1/3 cup sugar over the peaches, then pour on the rest of the batter.
Bake for another 45 minutes to 1 hour. Remove from the oven when it is puffed, golden-brown, and a knife comes out clean. Finish with a dusting of powdered sugar and serve warm.
Notes
To store your Peach Clafoutis, cover it and keep it in the fridge for up to 3 days. While freezing isn’t ideal due to texture changes, you can freeze it for up to 1 month if needed.When you're ready to reheat, microwave individual slices for 20-30 seconds or warm the entire dish in the oven at 350°F (175°C) until heated through.