Muscovado sugar
Unrefined cane sugar with its molasses never removed — darker, wetter, more acidic and more strongly flavoured than the soft brown sugar it is shelved beside.
Also called dark muscovado (UK); light muscovado (UK); barbados sugar (INTERNATIONAL); muscovado vs brown sugar (UK)
Muscovado is cane sugar from which the molasses has never been separated. Most soft brown sugar sold in Britain and North America is refined white sugar with molasses added back, which produces something similar and not identical.
THE DIFFERENCES THAT MATTER IN A MIXTURE are moisture, acidity and flavour strength. Muscovado holds more water, so it clumps, and it makes a bake softer and slower to stale. It is more acidic, which matters wherever bicarbonate of soda is the leavener — swapping it in can change how much gas is produced. And its flavour is markedly stronger and more bitter, particularly the dark grade, which will dominate a delicate cake.
IT CREAMS LESS WELL THAN CASTER SUGAR and less well than dry soft brown. Its crystals are smaller and its moisture makes the mixture cohere rather than aerate, so a creamed cake made entirely with dark muscovado is denser than the same cake made with caster. That is a legitimate choice for a gingerbread or a rich fruit cake and a poor one for a light sponge.
LIGHT AND DARK ARE DIFFERENT PRODUCTS, not shades of one. The dark grade carries several times the molasses of the light and behaves accordingly.
What changes if it is left out
Soft brown sugar is the closest substitute and gives a milder, drier result; dark muscovado is closest to dark brown sugar with a little treacle added. Caster sugar replaces the sweetness and none of the moisture, acidity or flavour.
Derived from the composition account above and from the brown sugar record. No ratio is stated because the substitution changes acidity as well as flavour.
RecordedFollows from evidence recorded elsewhere on BakeHQ
Storage and deterioration
Hardens in an open packet as its moisture escapes, which is a physical change rather than spoilage — it softens again in a sealed container with something damp beside it.
A description of what the hardening is, rather than a shelf-life claim.
RecordedTrue by definition rather than by measurement
Related
Compared in
One side of the comparison.
What it does
Moisture retention
The retained molasses is hygroscopic, which is why a muscovado bake stays soft and stales slowly.
pH modification
Distinctly acidic, and enough to change how much gas a bicarbonate-leavened mixture produces.
Browning contribution
Browns faster and darker than refined sugar.
Flavour contribution
The dominant flavour in anything it is used generously in.
Commonly confused with
Molasses never removed versus molasses added back. Similar to look at, and different in moisture, acidity and flavour strength.