Exhibit 23.3

CONSENT OF INDEPENDENT AUDITORS

We consent to the incorporation by reference in this Amendment No. 1 to Registration Statement No. 333-226795 of Magnolia Oil & Gas Corporation of our report dated May 8, 2018 related to the statements of revenue and direct operating expenses of the Giddings Assets for the years ended December 31, 2017, 2016 and 2015 (which report expresses an unmodified opinion and includes an emphasis-of-matter paragraph relating to the manner of presentation of the revenues and direct operating expenses of the Giddings Assets), incorporated by reference in the Current Report on Form 8-K of Magnolia Oil & Gas Corporation filed on August 6, 2018, and to the reference to us under the heading “Experts” in the prospectus, which is part of this registration statement.

/s/ DELOITTE & TOUCHE LLP

Houston, Texas

August 28, 2018