When ready to bake your cake, use the entire mix and combine in a mixer with 1 cup buttermilk, 1/4 cup milk, 1/2 cup vegetable oil, 1 teaspoon vanilla, and 3 large eggs. Bake in 2 greased 8-inch pans at 350 for 30-35 minutes.
Now that you have your cake mix ready, it's time to bake! Making a homemade yellow cake is not only tasty but easy to do! You can find the full recipe here.
Add Wet Ingredients to Cake Mix: In a large bowl, add one jar of your yellow cake mix and mix in 1 cup buttermilk, ¼ cup milk, 1 teaspoon vanilla, ½ cup vegetable oil, and 3 eggs. Note: Using room temperature wet ingredients will give you a batter free of lumps! Beat until everything is mixed together.
Add to Pan: Add a smooth layer of batter into 2 greased 8-inch round cake pans and bake for 35-40 minutes. You'll know your cake is done when a toothpick comes out clean or the center springs back when you touch it! Let cool completely before frosting.