Exhibit 23.1

CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

We hereby consent to the incorporation by reference in this Registration Statement on Form S-8 of Post Holdings, Inc. of our report dated November 19, 2021relating to the financial statements and the effectiveness of internal control over financial reporting, which appears in Post Holdings, Inc.’s Annual Report on Form 10-K for the year ended September 30, 2021.

/s/ PricewaterhouseCoopers LLP
St. Louis, Missouri
January 28, 2022