Making sourdough bread can be intimidating, but this recipe is the perfect guide if you’re ready to bake your first loaf of bread. The crust is crunchy, while the crumb is springy and delicious. The recipe calls for bread flour and whole wheat flour, but if you only have all-purpose flour, use 375 grams (1 ½ cups plus 2 tablespoons) water instead of 400 grams for the initial mix.