the mitered rabbet joint

Can you cut the rabbett before you cut the miter?

-- There are three kinds of people... those who can count, and those who can't

Is this on an insde edge or outside edge of a panel or frame? If outside, you could just go ahead and glue then use a stacked dado blade or router/guide afterwards. If inside, a router rabbeting bit then squareing up the corners with chisels works well, but Slacker’s idea would be easier.

-- Use the fence Luke

I’m assuming you already figured it out but if you haven’t I’ve got instructions

-- What do you learn from being right?