EXHIBIT 23 CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM We consent to the incorporation by reference in Registration Statement No. 33-39102 and 333-01275 of Lancaster Colony Corporation on Form S-8 of our report dated September 8, 2004, appearing in the Annual Report on Form 10-K of Lancaster Colony Corporation for the year ended June 30, 2004. /s/ DELOITTE & TOUCHE LLP - ---------------------------- Deloitte & Touche LLP Columbus, Ohio September 10, 2004