The completed joint

I start with a 5/4 piece of poplar and get it square.

Next I cross cut it in half and clean both ends on a shooting board

Tricky layout.There are a lot of cuts to make here. My goal was to make each one in an order that wouldn't remove any of my reference lines for the other cuts. 

I cut the dovetail first with my Dozuki

Next I flip it in the vise to saw for the shoulder 

The step actually goes below the dovetail so I rip  to the second scribe line 

Now to cut the cheek. I make a channel for the saw to ride in against the knife line

Then saw the waste off

Now I need to clean up the faces with a wide chisel

Once complete I cut out the waste from the tail

In order to layout the socket on the adjacent piece, I first need to cut the step. I rip it staying inside the line, then crosscut the waste off like shown above 

Now I transfer the dovetail

No good way to sneak a saw in here, so this is 100% carved using a 12mm and 44mm chisel

Once done I clean up the inside corners with skew chisels, and make sure everything is square 

And it fits.