Prepare a baking pan. Preferred 11” x 11” (about 28 cm x 28 cm) baking pan
Measure 2.5 inches more than the baking pan
Cut the parchment paper
Put the parchment paper into the baking pan and sides equally
Mark all the sides using your finger.
Then take the parchment paper out and mark again.
Cut only the red line. Do all 4 sides.
Add butter to avoid movement when adding the batter.
Put the paper back to the baking pan.
Stick all the sides to the butter.
Make sure the corners all fit.
This is the corner of the pan