What is the difference between "instant yeast" and "active dry yeast" ? I'm taking

aajay

Well-known member
up bread making again and have forgotten the difference. Actually, I remember when the only yeast came in little cakes like eraser rubbers.

 
I've read that instant yeast has fewer inactive cells, so it acts faster...more

You can use less because of the increased activity, but I don't know the equation.

Instant yeast does not have to be proofed. It can be added to the dry ingredients.

Using the least yeast needed to perform the required rise allows the other ingredients in the product to be up front.

 
The equation ...

Rose Levy Beranbaum says
for 1 tsp instant, use 1-1/4 tsp active dry
for 1 tsp active dry, use 3/4 tsp instant

She also points out that, because active dry yeast contains more dead yeast cells than instant, it is preferred for some kinds of dough, such as pizza dough, because the dead cells contain glutathione, which relaxes the gluten bonds and makes the dough easier to stretch.

The dead yeast cells also add a desirable flavor (but she doesn't define "desirable" -- a slight yeasty our sour flavor?).

 
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