Spray a 9x13 inch pan or a 10-inch bundt cake pan with cooking spray.
In a large bowl, combine cake mix, eggs, oil, vanilla, and beat until smooth (about 2 minutes). Add in the mandarin oranges with juice and lightly fold into the mixture until well blended.
Pour batter into greased pan.
Bake in the preheated oven for 35 to 40 minutes, or until a toothpick inserted into the center of the cake comes out clean. Allow to cool.
Recipe by Momma Chef at https://mommachef.com/scrumptious-mandarin-orange-cake/