I'm going to be honest, I'm looking for more occasions appropriate for wearing a red hooded cape.
1/2 yard red gingham fabric
1 yard red wool felt
1/2 yard 1/4" elastic (to attach skirt to onesie)
2 yards red gingham ribbon (cape trim)
The dress is really simple - a rectangle of fabric, elasticized and attached to a onesie. This simple dress will actually be the base for a lot of these costumes.
The cape required some geometry, but essentially it's a big half circle with a smaller circle cut for the neck and then a rectangle added for the hood. I had hoped to be more detailed in my instructions, but lost track of the camera in the process.
If there's interest, I can try to explain the method in a separate post.