Topping 1/2 cup unsalted butter 1 cup light brown sugar, packed about 2 to 3 medium/large ripe bananas, sliced into thick rounds (about 1/2 to 3/4-inch thick) Cake 1 large egg 1/2 cup light brown sugar, packed 1/4 cup granulated sugar 1/4 cup canola or vegetable oil...
