Cal-Maine Foods (CALM) 10-K 2017 FY Annual report

Exhibit 23.1

Consent of Independent Registered Public Accounting Firm

We hereby consent to the incorporation by reference in the Registration Statement (Form S-8 No. 333-180470) of Cal-Maine Foods, Inc. pertaining to the Cal-Maine Foods, Inc. KSOP and the Registration Statement (Form S-8 No. 333-184310) pertaining to the Cal-Maine Foods, Inc. 2012 Omnibus Long-Term Incentive Plan, of our reports dated July 21, 2017, relating to the consolidated financial statements and financial statement schedules, and the effectiveness of Cal-Maine Foods, Inc. and Subsidiaries’ internal control over financial reporting, which appear in the Annual Report to Shareholders, which is incorporated by reference in this Annual Report on Form 10-K.

/s/ Frost, PLLC

Little Rock, Arkansas

July 21, 2017