f you're new to Proof Syrup and looking for a flavor to start with, we recommend this one. This is the OG Proof Syrup — our first flavor and top seller. Made from organic cane sugar, real citrus oils, and the best aromatic bitters in the world, this syrup isn't a substitute for the "real" ingredients — it IS the real ingredients. Craft bartenders created Proof Syrup at a bar in Decatur, Georgia to take the time and hassle out of mixing the perfect Old Fashioned. Add your favorite aged spirit and you've got everything you need in one quick, easy pour. Any time, anywhere, every single time.