Brown Sugar

White sugar with molasses: 213 g packed per cup — "packed" is the instruction, not a suggestion.

1 cup packed

213 g

1 cup light

200–213 g

1 tbsp

13 g

Dark vs light

same weight, more molasses

DIY

1 tbsp molasses per cup of white

Hardened fix

bread slice + airtight, overnight

About Brown Sugar

"1 cup brown sugar, packed" means press it into the cup — the molasses makes it compressible, and unpacked cups run 15% light. Light and dark brown sugar weigh identically; the color difference is molasses percentage. Brown sugar hardens when its moisture escapes: an airtight box with a slice of bread rehydrates it overnight, or 20 seconds in the microwave for emergencies.