EXHIBIT 23.1

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CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

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We have issued our reports dated February 25, 2026 with respect to the consolidated financial statements and internal control over financial reporting included in the Annual Report of Winmark Corporation on Form 10-K for the year ended December 27, 2025. We consent to the incorporation by reference of said reports in the Registration Statements of Winmark Corporation on Forms S-8 (File No. 33-85972, File No. 333-120489, File No. 333-143281, File No. 333-172745, File No. 333-197600, File No. 333-197601, File No. 333-221109, File No. 333-239999, and File No. 333-285262).

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/s/ GRANT THORNTON LLP

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Minneapolis, Minnesota

February 25, 2026

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