Simplified: 3 layers flannel (pre-washed, approx 1 yd each, 1 layer plain, 2 layers patterned), extra wide satin ribbon (approx 360" or 10 yds). Use a small drinking glass to trace an even rounded edge on all flannel layers, cut away square corners. Use a ruffler attachment to sew satin ruffle, sew to plain flannel layer. Iron hem on patterned layers, then stack (right sides out), pin, and sew.
Also on these boards
Shift Dress Baby Blanket made with Lilly Pulitzer
Valentines Quilt Moda Surrounded by Love - Deb Strain Baby by MyBlankies
I wish I crocheted more! This blanket is AMAZING! Perfect for the baby boy that I don't have.