Persimmon pudding is similar to British dessert puddings, and according to this map, which shows the most googled foods by state, persimmon pudding is an important dish on the California Thanksgiving table.
Preheat the oven to 325 degrees F. Mix persimmon pulp with sugar. Add in the eggs, whisking. Then add the buttermilk and butter.
Sift the flour with the baking powder, nutmeg, and cinnamon. Fold the flour into the persimmon mixture. Pour the batter into a 9-inch greased pan, and bake for about an hour or until a tooth pick inserted into the center comes out clean.