Fresh to Dry Yeast

Fresh yeast contains much more water than active dry yeast, so you need less dry yeast by weight to provide a similar amount of fermenting power. A common baking rule of thumb is that 1 part dry yeast is roughly equivalent to 3 parts fresh yeast, which is why the fresh amount is divided by 3. This is an approximation used for recipe conversion, not a chemical law, so very rich doughs or long fermentation schedules may need slight adjustment.

Use this when converting a recipe that lists fresh or cake yeast into one that uses active dry yeast. It is especially helpful when you only have dry yeast on hand and need to match a baker’s original yeast amount by weight.

• Using the same weight of dry yeast as fresh yeast instead of dividing by 3
• Confusing active dry yeast with instant yeast and assuming the same conversion always applies
• Forgetting that this is a conversion by weight, not by volume