It's the easiest thing to do yet not many people know how.
Here's how to do it.
Special equipment: baking paper, scissors.
• Take a piece of baking paper, a bit larger than the area you want to cover.
• Fold it in half.
• Fold in half again.
• Fold it into a triangle.
• Fold it again into a smaller triangle.
• Take the pan you want to line, turn it upside down, and place the tip of your baking paper in the middle of the pan.
• Mark with your finger where you want to cut it (just inside the outer edge of the pan), take the scissors and cut a straight line through it.
• Unfold it and place it on the bottom of your baking pan.
If, by chance, it's too big, fold it again and cut it with the scissors.
Use it to line a baking pan or use it as a lid for cooking.