Pear and Walnut Upside Down Cake with Whipped Crème Fraîche
Tangy, luscious crème fraîche can easily be made by combining 1 cup of cream with 1 tablespoon buttermilk. Stir to mix completely, then leave at room temperature, covered with a clean towel, overnight....
Author: Cal Peternell, Chez Panisse Restaurant and Café