Preheat oven to 350F. Like a springform pan with a measured parchment paper round. Add the melted butter to the bottom and ensure it’s evenly spread.
Sprinkle the brown sugar so that it evenly coats the bottom. Arrange the slices of persimmon so that it covers the bottom of the pan, overlapping each slice.
Prepare your cake batter of choice and pour over the arranged persimmons in the cake pan. Bake for 30-35 minutes until center comes out with light crumbs when you insert a toothpick.