Light Brown Sugar vs Dark Brown Sugar
Light and dark brown sugar are the same thing — white sugar with molasses added back. The difference is just the amount of molasses: light brown has about 3.5% and dark brown has about 6.5%. This small difference affects flavor intensity, moisture, and color.
Side-by-Side Comparison
| Aspect | Light Brown Sugar | Dark Brown Sugar |
|---|---|---|
| Molasses content | ~3.5% | ~6.5% |
| Flavor | Mild caramel, subtle | Bold molasses, toffee, rich |
| Moisture | Slightly less moist | More moisture, stickier |
| Color in baked goods | Light golden brown | Darker brown |
| Best for | Cookies, most standard recipes | Gingerbread, BBQ, baked beans, intense flavor |
| Substitution | 1:1 for dark (milder result) | 1:1 for light (stronger result) |
Use Light Brown Sugar when…
- ✓Chocolate chip cookies (standard)
- ✓Most cake and muffin recipes
- ✓When the recipe just says 'brown sugar' without specifying
- ✓When you want caramel flavor without overpowering
Use Dark Brown Sugar when…
- ✓Gingerbread cookies and cake
- ✓Sticky toffee pudding
- ✓BBQ rubs and sauces
- ✓Any recipe where molasses flavor is the star
🏆 The Verdict
They are interchangeable 1:1 — just expect a stronger molasses flavor and darker color with dark brown sugar. If a recipe calls for dark and you only have light, add 1 tsp molasses per cup of light brown sugar to approximate it.