This recipe is a detailed roadmap to making bakery-quality light, flaky croissants in your own kitchen. With a pastry as technical as croissants, some aspects of the process — gauging the butter temperature, learning how much pressure to apply to the dough while rolling — become easier with experience. If you stick to this script, buttery homemade croissants are squarely within your reach. (Make sure your first attempt at croissants is a successful one, with these tips, and Claire Saffitz’s…