Preheat the oven to 325°F and adjust rack to middle position. Butter a round 10 x 1-inch baking dish (if you don’t have one you can use a 9-inch pie plate), In a large bowl whisk the sugar, heavy cream, eggs, almond flour, coconut flour, arrowroot, and almond extract until the batter is blended.
Scatter the cherries in the prepared baking dish; pour the batter on top. Bake for about 30-35 minutes, until a toothpick inserted in the center comes out clean. Cool for 10 minutes before serving.