A parchment paper lid forms a semipermeable barrier that allows some evaporation and browning, but not too much.
Kathy Kingsley on MSN10mon
How to Make the Flakiest Biscuits
Fold one side in, then the other ... You should be left with around 8 biscuits. 8. On a parchment paper-lined large, heavy ...
Pros fold parchment into a paper lid (called a cartouche) when they want to trap some heat and steam but don't want a tight seal. When a recipe instructs you to partially cover a dish as it cooks ...
Preheat oven to 425º and line a large baking sheet with parchment ... back to a 1"-thick rectangle. Repeat folding process, working fast so butter doesn't melt. Pat dough to a 1"-thick rectangle.