Add chopped persimmons, ice cream, milk, cinnamon, nutmeg, and vanilla extract to a blender. Tip: For extra creaminess, let the ice cream soften slightly before blending.

Blend on high speed until smooth and frothy, about 30-45 seconds. Tip: If the shake is too thick, add a splash more milk. Too thin? Add another scoop of ice cream.

Pour into chilled glasses and top with whipped cream and a cinnamon stick if desired. Tip: For a café-worthy touch, dust with a pinch of cinnamon before serving.