Preheat the oven to 350F degrees (or 325F degrees if using a glass pan). Grease and flour the bottom and sides of a 9×13 inch pan.
Add the cake mix, eggs, sour cream, 1/2 c oil, lime juice and lime zest to a large bowl.
Beat with an electric mixer until smooth.
Pour the batter into the prepared pan and bake for 27-32 minutes or until an inserted toothpick comes out clean and if you give the pan a gentle nudge the cake doesn’t wobble in the middle.
Remove from the oven and allow to cool.