In medium bowl, stir together bananas, 1/2 cup of the granulated sugar, the brown sugar, melted butter, vanilla and eggs. In another medium bowl, stir together flour, espresso powder, baking soda, baking powder and salt. Add flour mixture to banana mixture, stirring to combine. Stir in chocolate chips. Pour into loaf pans. Sprinkle remaining 1 tablespoon granulated sugar on top.