all purpose flour baking powder bittersweet chocolate brown sugar butter butter/margarine buttermilk cake cake flour canola oil chocolate confectioners sugar cooking spray corn syrup cream cheese dark brown sugar egg egg white egg yolk flour granulated sugar heavy cream light brown sugar milk milk chocolate peanut butter pie filling powder sugar powdered sugar pure vanilla extract salt semisweet chocolate semisweet chocolate chip sour cream sugar unsalted butter unsweetened chocolate unsweetened cocoa vanilla vanilla extract vanilla frosting vegetable oil vegetable shortening water whipped cream white sugar whole milk