Biscornu (offset square cushion)

Step 3 Optional step: add backing fabric

This step is optional, but I find that it makes your biscornu much sturdier and less likely to pull apart at the seams. Pin a layer of complimentary-coloured cotton or cotton-blend fabric to the back of each side of the biscornu design. If you are using a looser-weave fabric such as Aida or linen, the fabric will show through somewhat and it will keep your stuffing from poking through the weave. This will become your backing fabric.