Start with a piece of 15 in x 9 in piece of parchment paper with the long side facing you. Make a 1 inch fold upwards on the side closest to you. Press with your thumb or finger to make a crease. Flip the parchment paper so that the 1 inch fold is facing downwards.
Fold ⅓ of the width of the parchment paper (5 in) on the left side to overlap the center. Press with your thumb or finger to make a crease. Fold ⅓ of the width of the parchment paper on the right side to overlap the left side. Press with your thumb or finger to make a crease. Tuck the right side into the 1 inch fold.
Flip the folded paper so that the 1 inch pocket is facing upwards. Fold in half over the 1 inch pocket. Press with your thumb or finger to make a crease. Tuck the folded half into the 1 inch pocket.
Open the packet.
Press down about an inch from the right corner. Do the same for the left side. Press down firmly on both corners so that the packet can sit on its own.