what is the difference between fresh yeast and fast action yeast?
It might respond a bit quicker than active dry yeast, but the difference is minimal. ... 1 teaspoon instant yeast (3 grams) = 1/2 block (0.6 ounce size) fresh yeast. 7 grams of active dry yeast = 2 1/4 teaspoons active dry yeast = 17.5 grams fresh yeast = 1 block (0.6-ounce size) or 1/3 block (2-ounce size) of fresh yeast.