Mixed Berry Chocolate Slab Pie

This is a massive slab pie, which will easily serve a small army—or a few ravenous teenagers. Consider it a community pie, where everyone can contribute berries for the baking or come help you eat. Either way, it’s the easiest way to feed a lot of folks a great slice of pie from one hearty baking dish. Everyone will be swooning over the size, the flavor, and all the chocolate in each slice.

At first it may seem intimidating to roll the dough so large and transfer it to the pans, but