Here is what I see when I look at it, and how I would replicate making this coaster.
Ch 4 slst to form a ring
DC 12 (12)
INC In each st (24)
Inc, Dc repeat around (36)
IN FRONT LOOPS of previous round with Ruffle color yarn
DC 3 into each stitch.
IN BACK LOOPS of previous round (not the ruffle row)
Inc, DC 2 repeat around (48)
Chain 3, sk 3, slst repeat (should end up with 16 chain loops)
With ruffle yarn/color--
Chain 2,(counts as first DC) Dc 5 around first chain loop, Dc6 in all remaining chain loops.