In a medium bowl, stir together the flour, baking soda, salt, and cinnamon.
In a large bowl, cream together the butter, brown sugar, and vanilla until smooth. Beat in the egg until light and fluffy. Gradually stir in the dry ingredients until well blended.
Fold in the persimmon pulp until evenly distributed. Drop by rounded spoonfuls onto ungreased cookie sheets.
Bake for 12 to 15 minutes in the preheated oven, or until edges are lightly toasted. Allow cookies to cool on baking sheet for 5 minutes before transferring to a wire rack to cool completely.
Interesting Facts
Persimmons are a type of fruit native to East Asia.
Persimmons are high in vitamins A and C, as well as dietary fiber.
Persimmon pulp can be frozen for up to six months.