Who makes Kirkland Signature Organic Unbleached All-Purpose Flour, 10 lb (2-count)?
Kirkland Signature Organic Unbleached All-Purpose Flour, 10 lb (2-count) is rumored (unverified) to be made by Central Milling; no tier 1–5 evidence supports the claim as of July 5, 2026.
The common claim
What most answers say — and what the evidence supports
The widely repeated claim is that Central Milling, the Utah miller founded in 1867, makes Kirkland Signature Organic Unbleached All-Purpose Flour - and some listicles go further, saying Central Milling's own website admits it. The circumstantial case is strong but not conclusive, and that second part is a misread. Costco previously sold flour openly branded "Central Milling," then replaced it in the same bins with the Kirkland Signature organic bag around late 2022; bakers who tracked the switch report the flour changed little, and the Kirkland package still carries Utah organic certification. But the Kirkland packaging does not name Central Milling, and Central Milling's FAQ "wink wink" actually points customers to Whole Foods and Safeway - not Costco - for its retail flour. So Central Milling is rumored (unverified) to be the miller behind the current Kirkland organic flour, on strong circumstantial grounds, but no company statement, label, or regulatory record confirms it.
Evidence & sources
Every source is graded on the six-tier rubric and archived, so the citation holds even if the original moves or paywalls. The tier badge grades the source; the status grades our confidence in the maker.
Tier 6
Baker-community account of the rebrand (tier 6): "The Organic AP Flour in the 'Bin' at Costco may now look different label wise but in fact the flour is little changed from the previous 'Central Milling' Branded AP Flour sold by Costco. The 'newly labelled product' is part of a private label program being carried out by Central Milling for Costco and remains certified 'Organic' by the State of Utah." Key caveat, same post: "Print on the packaging does not mention anything about Central Milling as a source agent."
Tier 6
Listicle asserting (hedged in its own headline, "Likely Manufactured By") that Central Milling mills the Kirkland organic flour, citing that the Kirkland package is "certified organic by the Utah Department of Agriculture and Food." Its further claim that Central Milling's own FAQ hints Costco carries its flour is a misread: the FAQ 'wink wink' actually names Whole Foods and Safeway, not Costco (verified against the Central Milling FAQ, archived https://web.archive.org/web/20250810222628/https://centralmilling.com/faqs-flour-grains/ ). Tier 6.
Frequently asked
Does Central Milling make Kirkland Signature organic flour?
Does Central Milling's website say it supplies Costco?
Is the regular (non-organic) Kirkland all-purpose flour also from Central Milling?
Get notified when a Kirkland manufacturer changes
Suppliers switch quietly and most sites never notice. We track the changes and log the day a maker moves — the same tracking that powers the change log.
Change-log newsletter · no spam · unsubscribe anytime.