A baking book can do two things to make me cry. One is printing cup measures instead of weights. The other is calling for active dry yeast.
At least in the case of cup measure, there’s a genuine reason for the madness: most Americans don’t own a kitchen scale and are too stubborn to buy one. Hey, that’s cool. I can relate. I’m cheap and lazy, too, as you’ll see in a minute.
But active dry yeast? There’s no excuse. Instant yeast is sold in every supermarket, and it is cheaper (because you can use less) and easier to use than active dry, with absolutely no compromise in flavor. Using active dry is like sticking with canned peas after frozen peas were introduced. (Readers: this is your cue to stand up for canned peas in the comments.)
What’s the difference? Instant yeast (which is the same as “rapid-rise” or “bread machine” yeast) is processed differently at the factory in such a way that fewer yeast cells are killed, and you don’t have to proof it. Proofing yeast is one of those things that is just annoying enough to be a major barrier between you and delicious things you want to make. I don’t like to think of myself as the kind of person who would blow off an entire recipe just because I have to warm some water, empty a package of yeast into it, and wait a few minutes for it to bubble, but I’m totally that kind of person.
With instant yeast, you just toss it in with the flour and go. It’s a little more potent than active dry, so you can substitute by reducing the quantity by a third and skipping the proofing step.
Good baking books like Baking Illustrated only use instant yeast. So should you. Buy one of those little jars–around here they often go on sale for about $4 at this time of year–and keep it in the freezer. Then make raised waffles, bagels, pizza dough, and all that good stuff.