Some of Maalfrid's designs are knitted with waffle seam, as for example baby blanket 0001B SOFIA You can see how Maalfrid knits waffle seam at the pictures below
... knit the next 3 sts tog front, back, front in the same sts. This gives 3 new sts, ...
… strikk de neste 3 m sammen foran, bak, foran i samme m. Du får da 3 nye masker
...3 M zus stricken, dabei vorne, hinten, vorne in die gleiche M einstechen, das ergibt wieder 3 M, ...