I love to talk and write about bread (oh, and bake and eat it), so I’m always excited to answer reader questions on the topic. They often center on the differences between instant and active dry yeasts, and whether the two are interchangeable. If you’ve spent time scouring the labels of yeast at the store, you’ve no doubt noticed that brands seem to throw around the terms “instant,” “quick” or “rapid” for products that may or may not be the same thing.