The simple swap: Replacing oil with melted butter in boxed cupcake mix yielded a richer, scratch-made taste in Good Housekeeping's test. Texture trade-off: Oil produced moister, airier cupcakes, while ...

Boxed cake mix directions will say to use oil and butter, making them feel interchangeable. But that tiny choice is less like picking between two equivalent ingredients—and more like choosing between ...

We sheetcaked, so you don't have to.