Gingerbread Pear Trifle

4 tablespoons butter , softened, plus more for pan 1 1/2 cups flour 1 tablespoon baking soda 2 teaspoons cinnamon 1 1/2 teaspoons ground ginger 1 teaspoon[...]

4 large bosc pears , cored and sliced 2 tablespoons all-purpose flour 3 tablespoons butter 1/3 cup brown sugar , firmly packed 1 cup all-purpose flour 1/4 cup[...]

1 1/2 cups all-purpose flour 1 teaspoon baking powder 1 teaspoon ground ginger 1 1/2 teaspoons ground cinnamon 1/4 teaspoon ground cloves 1/2 teaspoon baking[...]