This classic cobbler is topped with a simple, rich biscuit dough that lets the berries really shine. The dough comes together in seconds in a food processor. Blackberries or raspberries may be used; a dash of cinnamon rounds out the berries' flavor. The biscuits are brushed with cream and given a light coating of sugar before baking, resulting in a crust with crunch. Vanilla ice cream is a sublime accompaniment.