Preheat the oven to 375 and place the cast iron pan in the oven to warm up.
Prepare the cherries by washing them and putting them. Set to the side.
Blend the flour, sugar, eggs, milk, cream, and extracts until smooth in a blender or hand blender. Set to the side.
Take the warm cast iron pan out of the oven and place the butter in it to melt. Make sure to move the butter around to reach all of the corners.
Arrange the cherries in the cast iron pan. It will be hot, so do this carefully. Cover the surface area of the pan with the cherries. Then, pour the batter around the cherries.
Place the cast iron pan back in the oven and bake the clafoutis for 50 minutes. When ready, the clafoutis will be slightly wiggly, and a toothpick will come out clean.
Let the clafoutis cool for about 30 minutes, then dust with powdered sugar.