Exhibit 23.1

Consent of Independent Registered Public Accounting Firm

The Board of Directors and Stockholders

Clearwater Paper Corporation:

We consent to the use of our reports dated February 24, 2013 with respect to the consolidated balance sheets of Clearwater Paper Corporation as of December 31, 2012 and 2011, and the related consolidated statements of operations, comprehensive income, cash flows, and stockholders’ equity for each of the years in the three-year period ended December 31, 2012, and the effectiveness of internal control over financial reporting as of December 31, 2012, incorporated herein by reference and to the reference to our firm under the heading “Experts” in the prospectus.

/s/ KPMG LLP

Seattle, Washington

June 4, 2013