
Sugar-free sweetener syrup is a simple-syrup-style liquid sweetener made without sucrose, using low- or no-calorie sweeteners.
It sweetens without sugar, and the difference shows in texture rather than taste. Sucrose gives body as well as sweetness, and most sugar-free syrups are thinner. A drink built on one can feel watery beside the sugar version.
Any other sugar-free syrup
Swaps one for one, but brands differ in sweetness, so taste as you go. Erythritol syrup can crystallize in the fridge, and stevia turns bitter in larger amounts. Allulose is about 70% as sweet as sugar and behaves most like it in a drink.
Conventional simple syrup
Start with the same amount of 2:1 syrup and taste. It brings back body and calories, so the drink stops being low-calorie.
Bulk sweeteners — erythritol, allulose — give a body close to sugar’s, while high-intensity ones like sucralose or stevia sweeten and add almost no body.
Refrigerate. How long it lasts depends on the sweetener rather than on the syrup — weeks rather than months, and none of them have sugar’s preserving effect.
Bloody Mary (low-calorie)
Vodka