Using Kosher Salt (Diamond Crystal) Instead of Sea Salt (fine)
Ratio
Use 2x the volume (1 tsp fine sea salt = 2 tsp Diamond Crystal)
Good — works well with minor differences
Recipe Adjustment Notes
Kosher flakes pack loosely — double the volume to match the salt content, or match by weight.
The Science Behind This Swap
Diamond Crystal's hollow flakes hold roughly half the mass per spoon of fine dense crystals.
Measurement Variance Note
For 1 cup references, this ingredient can vary by about 6% across brands and measuring methods (274g-310g per cup). For the most reliable substitution result, measure by weight and test a half batch first.
How Kosher Salt (Diamond Crystal) Compares for Sea Salt (fine)
Quality rating: good. Kosher flakes pack loosely — double the volume to match the salt content, or match by weight.