Also known as Active Dry yeast, it’s a type of dry yeast that’s granular, with a consistency similar to cornmeal. It’s a living organism that’s dormant until proofed or dissolved in a small amount of lukewarm warm water (105- 110°F). Active dry yeast (granular) is typically sold in individual packets or small glass jars. If using the latter, just make sure to refrigerate it after opening so the yeast stays fresh and active.