A properly seasoned pan gets seasoned over time through multiple uses that create a nonstick layer. If you cook on baking sheets often, seasoning will naturally happen the more you use them.

1 and 1/2 cups cake flour plus extra for cake pans 3 ounces unsweetened baking chocolate (good-quality, preferably Valrhona) 6 and 1/2 ounces bittersweet chocolate (good quality, preferably ...