Presenting the completed baby sweater:

The specs:
This pattern [1], sized up to fit larger than 12-mos size.
7mm hook
Main color: Sirdar Denim Chunky in off-white colour (the yarn is very loosely plied, but is quite durable)
Contrast color: Crystal Palace Yarns Poof [2] in Berry Parfait (such a yummy, soft yarn!)

For me to have completed this sweater, taking my time, in under a week is evidence of its simplicity. I know many people have stitched one of these up in a smaller size in just one day. Thanks Julie! I hope my cousin likes it.