Preparing the map
KJ, updated October 27, 2026, lists 285 Amsterdam Avenue and Rabbi Aaron D. Mehlman, NKS director. The operator confirms this door; its September 5, 2025 article attributes Madison production to NKS, with Cholov Stam dairy and individually designated pareve options. A current individual letter with dates and scope for this branch remains unverified; supervision is retained without upgrading to certified. The FAQ and Parve Fruit Tortes product page state that desserts offered for Passover are not kosher for Passover. Check the letter and each product’s designation; shared branding does not extend coverage. The branch-specific operator page closes Fridays at 18:00, versus Maps and the general FAQ at 18:30; confirm this difference. Reviewed October 28, 2026.
Source: ckj.org, wmgreenbergdesserts.com, wmgreenbergdesserts.com, wmgreenbergdesserts.com
William Greenberg bakery at 285 Amsterdam Avenue, Upper West Side. KJ lists Mehlman/NKS supervision for this door. A current individual letter remains unverified; its Passover desserts are not kosher for Passover. See the scope note.
285 Amsterdam Avenue, NY 10023
Upper West Side, Nueva York
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Yes: it is under the kosher supervision of NKS. When we last checked it is in the Kashrut section. If in doubt, confirm with the place. Kitchen: Chalavi (Dairy).
According to the listed hours, it opens on Saturday 8:00 AM–6:00 PM. It is not listed as shomer Shabbat.
Yes: West End Synagogue de Manhattan (Synagogue · 397 m) and Lincoln Square Synagogue (Synagogue · 423 m).
Yes: The West Side Mikvah (195 m).
Other places in the guide a short walk away.
