Plain’ ol mittens for your big handed man.
Pattern involves simple row by row instruction.

You will need:
1 200 yd skein of worsted weight yarn
1 set of 4 size 3 (3.25mm) DPNs or one shorter circular needle of the same size
1 set of 4 size 5 (3.75mm) DPNs or one shorter circular needle of the same size
One stitch marker
Waste yarn (2 pieces approx. 6” long) or 2 stitch holders
Yarn needle