This is a log cabin-style aran weight blanket with a little bit of a difference. Traditional log cabin style blocks are worked but rather than overlapping at the corners and building on the layer below, small mitered squares are used instead to add visual interest.
The sample shown was knit in 2 shades of West Yorkshire Spinners BFL Aran (cream & neutral brown) and the dark grey was Lopi Lettlopi - dark grey heather.

The pattern can be bought at my Payhip store: https://payhip.com/b/b8wAd

Please note: the actual pattern name is Log Cabin-ish blanket but this wasn’t allowed due to Ravelry pattern naming rules.