Quick Answer
The “fructose” in bubble tea usually means high-fructose corn syrup (HFCS), made by enzymatically breaking corn starch into glucose and converting part of it into fructose. According to English Wikipedia, the common HFCS 55 contains about 55% fructose and is about as sweet as sucrose, mostly used in drinks; HFCS 42 is mostly used in processed foods. Cane sugar syrup is sucrose (from sugarcane or sugar beet) dissolved in water, with a rounder flavor. Shops choose sugar on flavor, cost, consistent sweetness and labeling, and use dispensers and dosage charts to keep every cup the same.
Fructose Syrup vs Cane Sugar Syrup
| Comparison | Fructose (HFCS) | Cane sugar syrup |
|---|---|---|
| Raw material | Corn starch | Sucrose (sugarcane or sugar beet) |
| Process | Starch → glucose → part converted to fructose | Sucrose dissolved in water |
| Sweetness | HFCS 55 about equal to sucrose (Wikipedia) | Baseline |
| Flavor | Clean sweetness | Rounder |
| Common use | Drinks, base sweetener in bubble tea | Drinks that highlight cane sugar flavor |
How Is High-Fructose Corn Syrup Made?
Summarized from English Wikipedia’s “High-fructose corn syrup”:
- Corn starch is broken down into glucose by enzymes.
- Xylose isomerase converts part of the glucose into fructose.
- Refining steps such as filtration and demineralization follow.
Wikipedia also notes that in the 1970s and 1980s, US drinks and processed foods widely replaced sucrose with HFCS.
How to Keep Sweetness Levels Consistent
“Full sugar, half sugar, light sugar” in bubble tea has no legal definition, and each shop defines it differently. To keep every cup consistent:
- Set grams of sugar for each sweetness level and write them into the SOP.
- Use a fructose dispenser that delivers a fixed amount per button.
- Quantify other syrups too: Tang Sugar’s fruit syrup chart, for example, converts light, half, regular and extra sweetness into grams for 500ml and 700ml cups; see the Fruit Syrup Dosage Guide.
- Calibrate dispensers regularly; see Syrup and Powder Dispensers.
Chains in Taiwan must also label total sugar and calories per cup, which requires fixed sugar amounts; see Taiwan’s Bubble Tea Labeling Rules and the Sugar and Ice Level Guide.
Tang Sugar’s Sweeteners
Tang Sugar supplies fructose syrup (25kg drums, plus 2.5kg and 5kg cartons), cane sugar syrup (25kg drums and cartons), brown sugar syrup and raw cane sugar, along with many fruit syrups. Request samples.
FAQ
What is the fructose used in bubble tea?
Usually high-fructose corn syrup, made from corn starch by enzymatic conversion; the common HFCS 55 contains about 55% fructose.
Is fructose syrup sweeter than sugar?
According to English Wikipedia, HFCS 55, commonly used in drinks, is about as sweet as sucrose.
What is cane sugar syrup?
Sucrose dissolved in water as a liquid sugar, easy for bubble tea shops to dose directly.
How do bubble tea shops standardize sweetness?
Set fixed grams for each sweetness level, dispense with a calibrated dispenser, and weigh other syrups to a dosage chart.
How is fructose syrup made?
Corn starch is broken down into glucose by enzymes, part of the glucose is converted into fructose, and the result is adjusted into products with different fructose ratios such as HFCS 42 and HFCS 55.
Where can shops buy commercial fructose syrup?
Usually wholesale in drums or cartons from ingredient suppliers, used with a fructose dispenser. Tang Sugar offers fructose (25kg drums, 2.5kg and 5kg cartons) and cane sugar syrup.
What is the difference between cane sugar and white sugar?
White granulated sugar is mostly sucrose and can be made from sugarcane or sugar beet, refined to remove molasses and impurities. In bubble tea, “cane sugar” usually means sugar or sugar syrup made from sugarcane. Chemically, white sugar is refined sucrose; the differences are the raw material and the degree of refining.
What is the difference between rock sugar and cane sugar?
Rock sugar is made by dissolving sucrose and letting it slowly recrystallize into large crystals, so its main component is also sucrose. The difference is the crystal form and process. Rock sugar is often used to cook sugar water or drinks such as rock sugar lemon tea.
What is the difference between fructooligosaccharides and fructose?
Fructose is a single sugar molecule (a monosaccharide), while fructooligosaccharides (FOS) are short chains of several fructose units and are much less sweet. The “fructose” used in bubble tea shops is high-fructose syrup, which is a different product from FOS.
Further Reading
Sources
- Wikipedia: High-fructose corn syrup
- Tang Sugar product list (March 2026 edition)
