In this buttery cobbler, slices of rhubarb are roasted with sugar before rounds of biscuit dough are added to the pan. This extra step allows the rhubarb juices to condense into a sweet-tart syrup and eliminates the need for a thickener like cornstarch or tapioca, which can muddy the flavors. The result is a bright-tasting, flaky cobbler that’s gently scented with vanilla and a little orange zest. Topped with a drizzle of heavy cream or a scoop of ice cream, it makes a rose-tinged dessert that’s both lighter and bolder than others of its kind.