Step 1. Combine the water and sugar in a saucepan. Simmer over medium heat, stirring occasionally, until the sugar dissolves. Starbucks sells an official “Pumpkin Sauce” to consumers, and though it is advertised as such, PSL connoisseurs know this is not the same syrup they use in the stores. For years, if you wanted Starbucks Pumpkin Spice Latte syrup, you had to buy it on the black market, but not anymore, because Starbucks has released it on its online store for purchase … Add the spices and the item 6 2 Starbucks Pumpkin Spice Syrup Sauce FRESH WITH PUMP 63oz BB Apr 2021 FREE SHIP 6 - 2 Starbucks Pumpkin Spice Syrup Sauce FRESH WITH PUMP 63oz BB Apr 2021 FREE SHIP. … While Starbucks has yet to make a "skinny" sugar-free version of the pumpkin spice syrup, there are a few ways to lighten up the drink. Make it a "lighter" PSL drink.