HERE's an article that sums it up pretty well. He mentions the addition of gypsum but he doesn't say how much, what his water is like or any final water numbers so it might be nice to get a better handle on that. I drew up a recipe with pilsner + vienna + munich + an addition of Horizon as a FWH and then Hallertau at 30 and again at 5 minutes (I do 30-minute boils so I can't do the 60-30-5). The article did a nice job explaining where dortmunder fits in with helles, pilsner, maibock, etc. Cheers.
Cool, thanks! I had run across that article too, and it seemed like the most in-depth out there.
Re: your other post, Great Lakes Dortmunder gold is indeed listed as having crystal 60 on their website. But, it's also a "classic" early 1990s recipe, so I suspect the grist might be a holdover from the Good Old Days when American breweries were doing a little bit of everything to approximate European beers. That doesn't mean it's a bad beer, of course, (I *love* their beers, and am in fact wearing a GLB t-shirt as I type this!), and crystal malt isn't a completely unreasonable substitution if you can't get Munich malt easily.