Coffee syrup seems simple until you actually start tasting them side by side. Over the past few weeks, I tested the most popular coffee syrup brands in hot coffee, iced coffee, lattes, cold brew, and milk-based drinks. I paid close attention to: Flavor quality and realism Sweetness balance and aftertaste Performance in hot vs iced drinks Sugar-free options Variety and creativity Value for everyday use Some brands were nostalgic. Some were disappointing. A few truly stood out.