Maple syrup
A liquid sugar that is mostly sucrose and mostly water — so substituting it for granulated sugar changes the hydration before it changes the sweetness.
Also called pure maple syrup (US); maple (INTERNATIONAL); pancake syrup (US) — Usually a flavoured corn syrup rather than maple, and it behaves differently because its sugars differ.
Maple syrup is concentrated maple sap, predominantly sucrose in solution with a substantial proportion of water and the flavour compounds developed during boiling.
THE WATER IS THE PART THAT CATCHES PEOPLE OUT. Swapping it one-for-one by weight for granulated sugar adds liquid to a formulation that was not expecting any, which is why cakes made that way come out wetter and denser and why biscuits spread further. The correction is to reduce another liquid, and BakeHQ publishes no ratio for it because the right adjustment depends on how much of the recipe’s liquid was doing structural work.
IT BROWNS MORE READILY than granulated sugar, both because it is already a syrup and because it carries compounds that take part in browning reactions. Bakes made with it colour sooner, which is a reason to check them earlier rather than a fault.
IT IS HYGROSCOPIC, so bakes containing it stay softer for longer — the same property that makes honey- and treacle-rich cakes keep well.
UNLIKE TREACLE OR HONEY IT IS ESSENTIALLY NEUTRAL IN ACIDITY, which matters: a recipe leavened with bicarbonate of soda relying on an acidic syrup will not rise the same way if maple syrup is substituted in, because the acid the bicarbonate needed has gone.
What changes if it is left out
Another liquid sugar of similar water content — honey or golden syrup — replaces the bulk and the moisture and changes the flavour. Granulated sugar replaces the sweetness and removes the liquid, so something else has to make it up. Where the recipe leavened with bicarbonate of soda and an ACIDIC syrup, maple syrup is the poor swap in that direction rather than this one.
Follows from the sugar and acid-base leavening records, which carry their own support. BakeHQ publishes no composition figures for maple syrup, because grade and producer both move them.
RecordedFollows from evidence recorded elsewhere on BakeHQ
Related
What it does
Hydration
A substantial part of it is water, and swapping it for granulated sugar adds that water to a formulation not expecting any.
Browning contribution
Browns sooner than granulated sugar, both because it arrives as a syrup and because it carries compounds that take part in the reactions.
Moisture retention
Hygroscopic, so bakes containing it stay softer for longer — the property honey- and treacle-rich cakes are valued for.
Can stand in for
Close on bulk and moisture, different on flavour. THE TRAP IS ACIDITY: maple syrup is essentially neutral, so a recipe leavened by bicarbonate of soda reacting with an acidic syrup loses its rise when maple is substituted in.