Someone gave me a bunch of envelopes of pizza crust yeast, "specially formulated for pizza crust". The packets also say that no rise time or proofing is needed, and that it's "NOT recommended for bread baking." The ingredients are yeast, enzymes, sorbitan monostearate, l-cysteine, and ascorbic acid. It does provide a recipe for pizza crust, with just mixing and a bit of kneading.
What has actually been done to this yeast to make it work like this? (What are those enzymes?) And is there any way I can use it for other things, or is it really only good for things like pizza crust?
Best Answer
It sounds like you have Fleischman's Pizza Crust Yeast (or a no-doubt quite similar product if from another manufacturer). The relevant phrase from the Fleischman marketing web site is:
It is intended to make it easier to stretch the pizza dough into shape.
The yeast itself is normal instant yeast, to the best of my knowledge—the additives in the packet are what make it "pizza crust yeast".
Researching the additional ingredients other than yeast:
Sorbitan monostearate—According to Sci Toys is an emulsifier with a polar and non-polar ends:
Cooking for Engineers mentions that this helps the dough absorb the water.
l-cysteine*—is an amino acid, which is naturally occurring, and often extracted from hair or feathers. This article from LALLEMAND explains the science in bread dough, where it acts as a reducing agent:
ascorbic acid*—is of course Vitamin C, and a fairly strong acid. According to Effect of Ascorbic Acid on the Rheological Properties of Wheat Fermented Dough in Czeck Journal of Food Sciences, at concentrations under 0.6% it has little effect on wheat flour, so it is unlikely to have any practical effect in a full batch of pizza dough. Its inclusion is probably (as mentioned in Cooking for Engineers) as an anti-oxidant and preservative in the packet, rather than as an active ingredient in the bread dough.
enzymes—no doubt the particular enzymes and their ratios are proprietary to the brand you have, but according to the Wikipedia article on flour treatment agents, they are used to increase transformation of starch into sugars to facilitate the action of the live yeast. Common enzymes used include:
See also this Baker's Yeast article from Cooking for Engineers which discusses various commercially available forms of yeast.
My personal opinion is that I would not buy "pizza crust yeast," since recipes are not designed for the presence of its dough conditioners. I would rather control my dough's ingredients myself. However, since you have the product, why not try it using the vendor's recipe? I would be fascinated to hear how it performs.