CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM
The Board of Directors and Stockholders
Alon USA Energy, Inc.
We consent to the incorporation by reference in the registration statement (No. 333-127051) on Form
S-8 and the registration statement (No. 333-163430) on Form S-1 of Alon USA Energy, Inc. (the
Company) of our reports dated March 16, 2010, with respect to the consolidated balance sheets of
Alon USA Energy, Inc. and subsidiaries as of December 31, 2009 and 2008, and the related
consolidated statements of operations, cash flows and stockholders equity for each of the years in
the three-year period ended December 31, 2009, and the effectiveness of internal control over
financial reporting as of December 31, 2009, which reports appear in the December 31, 2009 annual
report on Form 10-K of Alon USA Energy, Inc. Our report refers to the Companys adoption of the
authoritative guidance for fair value measurements as it relates to financial instruments,
effective January 1, 2008.
/s/ KPMG LLP
March 16, 2010