1 cake compressed yeast= 1 package active dry yeast
1 package dry yeast= 2 1/4 teaspoon active dry yeast
active dry yeast and instant/rapid rise yeast can be used interchangeably in recipes.
What is the difference?
Instant/Rapid rise is:
* finer, so it absorbs liquid faster
* does not need to be dissolved before using, but can be added into the dry ingredients
* takes half the time to rise
* only requires one rising.
