Exhibit 23.3 Consent of Marshall Miller & Associates We hereby consent to the use by Peabody Energy Corporation (formerly P&L Coal Holdings Corporation) in connection with their Registration Statement on Form S-3 and any amendments thereto, of our report dated March 30, 2001, addressed to P&L Coal Holdings Corporation relating to certain coal reserve information. We also consent to the reference to Marshall Miller & Associates in the Prospectus contained in such Registration Statement. Marshall Miller & Associates By: /s/ K. Scott Keim ------------------------------------------- K. Scott Keim President-Energy & Mineral Resources Group