I used a basic baking dish, but you can use any pan you prefer. If you don't want a specific shape, you can bake it on a baking sheet or pizza stone. Another popular option is to use a cast-iron skillet. The key to making focaccia bread is using some sort of baking dish that will retain heat. You are looking for something that will heat the bottom of the bread while allowing the top of the dough to cook at its own speed.