Ingredients

• 1/3 cup vegetable oil, plus more for pan
• All-purpose flour (for pan)
• Homemade Yellow Cake Mix
• 3 large eggs
• 1/2 teaspoon vanilla extract
• 2 cups favorite frosting

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Instructions

1. Preheat oven to 350°F. Grease and flour a 13x9" baking dish.
2. Using an electric mixer on medium speed, beat cake mix, eggs, vanilla, 1/3 cup oil, and 1 cup water in a large bowl until combined, about 2 minutes. Pour batter into prepared pan. Bake cake until surface springs back to the touch and cake is set and golden brown, 25–30 minutes. Let cool completely, then turn out onto a platter before frosting.
3. Do Ahead Cake can be made 3 days ahead; store at room temperature.
4. Cake can be made 3 days ahead; store at room temperature.