What You Need to Know
The process relies on precise oil temperatures (170–190 °C) and short frying times (2–3 min) to trigger the Maillard reaction between reducing sugars and amino acids, while yeast fermentation generates CO₂ that leavens the dough. The Maillard reaction yields melanoidins and other browning compounds, giving the golden crust, whereas the syrup, boiled to 104–105 °C, concentrates sucrose and imparts a glossy, sweet coating.
The Science
Primary Reaction
Maillard reaction (reducing sugars + amino acids)