Some uses for compressed cake yeast include adding it to bread dough as a rising agent and using it as an ingredient in pizza dough. Compressed cake yeast is a fresh yeast that works in most recipes that call for active dry yeast.
A 0.6-ounce cake of compressed yeast is equivalent to one 1.25-ounce package of active dry yeast in recipes. The cake yeast needs to be dissolved in water and proofed to make sure it is still alive before use. The proofing procedure involves adding a little sugar to the dissolving water and waiting five to 10 minutes. If the yeast foams up, it is alive and ready for use.