Sweetness: Peach Schnapps is generally quite sweet, so the Sangria is sweet enough from the combination of Peach Schnapps and fresh orange juice (without adding any additional sugar). However, if you find you want this a bit sweeter, you can add simple syrup. You can buy simple syrup or you can easily make it at home by dissolving sugar in water (1 cup sugar to 1 cup water) and then cooling it down. You can also add more Peach Schnapps but consider that will increase the alcohol content further.