Step 1: Preheat Oven and Prepare Pan: Preheat the oven to the temperature specified on the cake mix box (usually 350F/175C). Grease and flour a 9x13 inch baking pan (or two 8-inch round pans) to prevent the cake from sticking. A light dusting of flour after greasing ensures easy release.
Step 2: Combine Wet Ingredients: In a large mixing bowl, combine the eggs, vegetable oil, and water (or milk). Whisk these ingredients together until well blended. The mixture should appear homogenous and slightly frothy.
Step 3: Incorporate the Cake Mix: Gradually add the boxed cake mix to the wet ingredients, mixing on low speed with an electric mixer (or by hand with a whisk) until just combined. Avoid overmixing, as this can lead to a tough cake. Scrape down the sides of the bowl to ensure all ingredients are fully incorporated. Add vanilla extract if desired.
Step 4: Pour Batter into Pan: Pour the batter evenly into the prepared baking pan. Use a spatula to spread the batter to the edges of the pan, ensuring a uniform thickness for even baking.
Step 5: Bake the Cake: Bake in the preheated oven for the time specified on the cake mix box (typically 25-35 minutes). Begin checking for doneness around the 25-minute mark. The cake is done when a toothpick inserted into the center comes out clean or with a few moist crumbs attached.
Step 6: Cool the Cake: Remove the baked cake from the oven and let it cool in the pan for 10-15 minutes. This allows the cake to set slightly before inverting it onto a wire rack to cool completely.
Step 7: Frost and Decorate: Once the cake is completely cool, frost with your favorite frosting (chocolate, vanilla, cream cheese, etc.). Decorate as desired with sprinkles, chocolate shavings, or fresh fruit.
Tips and Substitutions:
For a richer flavor, substitute milk for water. For a denser cake, add an extra egg. To prevent a dome from forming during baking, use baking strips wrapped around the pan. Consider adding chocolate chips, nuts, or fruit to the batter for added flavor and texture.