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Golden Syrup: Sugar Inverted with Citric Acid
Golden syrup is a thick amber syrup of partly inverted sugar: some of the sucrose is split into glucose and fructose, which keeps it from crystallising. Lyle's refinery chemist Charles Eastick worked it out in 1883. At home it is made by boiling sugar and water with a little citric acid until thick and amber.
The picture: golden syrup seen from above in an open tin.
Beginner
About an hour
Instructions
1
1
Sugar, water, acid
Sugar, water, acid
Put the sugar, water and citric acid in a heavy saucepan and stir over the heat until it boils and the sugar has dissolved.
Materials for this step:
White Sugar1 kg
Water0.5 liter
Citric Acid3 gTools needed:
Balance Scale
Measuring Jug
Saucepan
Hot Plate
Wooden Spoon2
2
Boil slowly, do not stir
Boil slowly, do not stir
Turn the heat down and let it boil slowly without stirring until it is thick and amber. Drip a little on cold glass now and then: it should run thick, like honey.
Tools needed:
SaucepanHot Plate
Glass Sheet
Heat-Resistant Gloves3
3
Cool and jar
Cool and jar
Take it off the heat; it thickens more as it cools. Pour it warm into a clean jar.
Tools needed:
Glass JarHeat-Resistant Gloves4
4
What inversion does
What inversion does
Loading Jupyter Notebook...
5
5
Limits
Limits
The method is the home method given by Wikipedia; the quantities are ours. Factories invert half the syrup with hydrochloric acid or invertase and blend it back. Boiling sugar burns badly: keep children away.
Materials
3- 1 kgPlaceholder
- 0.5 literPlaceholder
- 3 gPlaceholder
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