Waffle stitch forms a textured fabric, resembling a waffle dishcloth.
It's a repeating pattern over four rows, and is quite straightforward.
Abbreviations: k = knit; p = purl; st = stitch
Instructions (cast on a multiple of 3st plus 1):
Row 1: k to end
Row 2: p to end
Row 3: *k1, p2, repeat from * to last st, k1
Row 4: *p1, k2, repeat from * to last st, p1.
These four rows form pattern.