Some of the best brands of chocolate fudge syrup include Herrell's Hot Fudge and Williams-Sonoma Hot Fudge Sauce, according to Serious Eats. For sugar-free chocolate syrup, the best brand is NuNaturals NuStevia Cocoa Syrup, according to AllWomensTalk.
Herrell's Hot Fudge is both fudgy and buttery with a good texture and thickness. The reviewers at Serious Eats also state that it creates a slight shell on top of ice cream but keeps its creamy texture. Williams-Sonoma Hot Fudge Sauce has a rich, dairy flavor and a somewhat oily texture. In terms of sugar-free chocolate syrups, NuNaturals NuStevia Cocoa Syrup is sweetened with stevia and is also vegan, carb-free, calorie-free, gluten-free and free of GMOs.