Yep, I make those every so often. We have Culver's here now, so we can get them in a (sorta) fast food setting.
Seeing as you're in northern Texas, have you ever snuck across the border for one of those Oklahoma fried onion burgers?
I have not had an Oklahoma onion burger, but plan to make one.
We have a Culver's not far from me -- next town over. Had the butter burger. Had the frozen custard. Survived.
CD