Cut 5 fabric squares, each measuring 9" by 9", 1 for the backing and the other 4 for the pinwheels.
Cut one piece of batting the same size, doubling it up if needed for extra thickness.
Use hem tape to attach baking fabric to batting before quilting from the center to avoid shifting. Trim the quilted panel if necessary.
Quilt the backing square and batting together.
Trim the panel if shifting has occurred
To make the loop, fold the fabric strip in half lengthwise and press. Fold again in half and press, then edge stitch along the open edge before pressing to form a loop.
Fold the 4 squares in half diagonally and press.
Trim these triangles if they exceed the quilted panel's size.
Arrange the pinwheel triangles along the edges of the quilted panel, aligning raw edges. Start with the first triangle like so
Add the second triangle to the next raw edge of the quilted panel
Continue with the third triangle to the next edge
Add the fourth triangle to the next raw edge.
Then flip the half that is on top of the first triangle.
Flip half of the first triangle to a side
Fold the fourth triangle back
Fold the first triangle back over the fourth triangle. At this point all triangles should face the backing panel with half of their size.
Place the loop as desired between the quilted panel and pinwheels, with raw ends up
Clip the hot pad layers and sew with a 1/4" seam allowance.
Clip corners
Turn the pad right side out through the center gap. Use a point turner to push out corners, smooth seams, and press.
Optionally, stitch in the ditch at the center to keep the pad flat during washes.