Ginger Pear Upside-Down Cake For the topping: 3 Tbs unsalted butter, at room temperature ½ cup light brown sugar 1 ½ tsp ground cinnamon 4-5 medium to large ripe pears, peeled, cored, and quartered lengthwise For the batter: 8 ounces (2 sticks) unsalted butter, at...