The cookies consist of two chocolate wafer sandwiching a layer of chocolate and whipped cream-flavored creme.
The new flavor is currently rolling out and has already been spotted in stores. You can find it in 10.7-oz packages.
Mississippi Mud Pie Oreo cookie mark the second exclusive flavor of the famed sandwich cookie this summer. The other, Waffle & Syrup, is exclusive to Albertsons.
Photo via Dollar General.