This golden vanilla butter cake is proof that a boxed mix can taste completely homemade with just a few thoughtful upgrades. By swapping oil for real butter, adding sour cream for moisture, and using milk instead of water, this cake bakes up rich, tender, and full of flavor. It’s the kind of recipe you turn to when you want something reliable yet impressive. Perfect for family gatherings, celebrations, or everyday treats, this cake delivers bakery-style results without the stress of a from-scratch recipe.