Jack of too many trades..
Join Date: Aug 2013
Location: St. Louis
If your build material is plywood, most "fancy" joints are going to be waste of your time as the plywood is likely to splinter and chip easily once you get it together.
Honestly, I would just glue, screw, and clamp it together with butt joints. I did this for a couple intermediate-solution cabinet drawers
To get a little more fancy you could cut a dado to help seat the pieces together - especially in the sides to help hold the bottom, and then glue, clamp, and screw it together.