Baking Science
Brown sugar vs. white sugar in baking: does it matter?
They taste similar and look almost the same. But swap one for the other in a recipe and you will notice a difference — in texture, colour, moisture, and spread.
4 min read
What is the actual difference?
Brown sugar is simply white sugar with molasses added back in. Light brown sugar contains about 3.5% molasses; dark brown sugar contains about 6.5%. That molasses is responsible for the colour, the slight caramel flavour, and — most importantly for baking — the moisture.
How each sugar behaves in baking
White sugar is dry and neutral. It creams well with butter, creates a crisp texture in cookies, and helps baked goods spread. Brown sugar is hygroscopic — it attracts and holds moisture. This makes baked goods chewier, denser, and darker. It also adds a subtle depth of flavour that white sugar cannot replicate.
In cookies, this difference is very visible. A cookie made with all white sugar will be thinner, crispier, and lighter. The same cookie made with all brown sugar will be thicker, chewier, and slightly darker. Most recipes use a combination of both to balance spread, texture, and flavour.
The weight difference matters too
Brown sugar weighs more than white sugar per cup — because molasses is dense and sticky, it fills the gaps between sugar crystals. One cup of brown sugar weighs 220 grams, while one cup of granulated sugar weighs 200 grams. That 10% difference adds up in a recipe — another reason to weigh rather than measure by cup.
Brown sugar also needs to be packed into the cup for a consistent measurement — but even then, how firmly you pack it changes the result. Weighing eliminates this entirely.
When you can substitute, and when you cannot
For most cookies, muffins, and quick breads, you can substitute brown for white sugar or vice versa without ruining the recipe. The texture and colour will shift, but the bake will work. In delicate recipes — white cakes, meringues, certain pastry creams — white sugar is non-negotiable. The added moisture from brown sugar would collapse the structure.
Coconut sugar and turbinado sugar behave similarly to brown sugar — both are unrefined and contain trace minerals that add flavour and colour.
The takeaway
Brown sugar adds moisture, chew, and depth. White sugar adds crispness and neutrality. They are not interchangeable in precise recipes — and because brown sugar weighs more per cup, always weigh both.