Preheat the Oven: Preheat your oven to 350°F (175°C). Grease and flour a 9x13-inch baking pan or two 9-inch round cake pans.,
STEP 2
Prepare the Cake Batter: In a large mixing bowl, combine the cake mix, orange juice, vegetable oil, eggs, orange zest, and vanilla extract. Beat with a hand mixer or whisk until the batter is smooth and no lumps remain.,
STEP 3
Bake the Cake: Pour the batter into the prepared pan(s) and bake for 25-30 minutes or until a toothpick inserted in the center comes out clean.