Sugars & Sweeteners

Liquid Glucose in gelato

Liquid glucose is a thick, clear starch-derived syrup (DE 42) containing about 80% saccharide solids and 20% water. In gelato it is a doctoring sugar: it adds body and total solids while contributing far less sweetness and freezing-point depression than sucrose.

Balancing parameters

Per 100 g of product, verified against independent food-science sources (listed below).

ParameterValue
Total Solids80%
Water20%
Sugars80%
Fat0%
MSNF0%
Protein0%
POD (sweetening power)40
PAC (anti-freezing power)64

Typical use: 3-8% of the total mix (commonly 20-35% of the total sugar blend, replacing part of the sucrose)

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How to use it in gelato

Liquid glucose is used to raise total solids and improve body without oversweetening. Because DE 42 glucose has roughly half the sweetening power (POD ~40 at 80% solids) and lower anti-freezing power (PAC ~64) than sucrose, replacing part of the sucrose with it lowers both sweetness and freezing-point depression, yielding a firmer, chewier, more scoopable texture. Its higher saccharides suppress ice-crystal growth and lactose crystallisation, improving smoothness and shelf life. Overuse produces a gummy, sticky, pasty body. Note the ~20% water it brings to the mix.

Origin & background

Glucose syrup traces to 1811, when the Russian chemist Gottlieb Kirchhoff first hydrolysed potato starch into a sweet syrup using dilute sulfuric acid, launching the industrial starch-sugar industry. Modern liquid glucose is made by controlled acid or enzyme hydrolysis of corn, wheat or potato starch, standardised by Dextrose Equivalent (DE), with DE 42 being the classic confectioner's grade.

Frequently asked questions

Sources

More sugars & sweeteners ingredients

Substitutes for Liquid Glucose