Cantilevered Desk

[Michael Burnside]

Bridle joints are a good idea (per glenn) but honestly several 10MM dominos in each joint would be pretty strong. You could even do exposed through-dowels if you want to over-kill it (per stan). Personally I would use a hidden spline in the back which might be what Andy was mentioning.

That said, I would definitely construct the legs out of 8/12 lumber though. Your drawing appears to show the top and the legs the same size, maybe 3/4 which is a bit thin for my comfort and taste.