Exhibit 23 INDEPENDENT AUDITORS' CONSENT We consent to the incorporation by reference in Registration Statement No. 333-42859 of Merrill Lynch & Co., Inc. on Form S-3 of our reports dated March 20, 1998, appearing in this Annual Report on Form 10-K of Merrill Lynch Preferred Capital Trust III and Merrill Lynch Preferred Funding III, L.P. for the year ended December 26, 1997. /s/ Deloitte & Touche LLP New York, New York March 23, 1998