Can this be made without the vital wheat gluten? Probably, but I haven't tried it.
I found a jar on clearance at Walmart and stuck it in the freezer so I'd have it for just this sort of recipe.
My recipe is for a one pound loaf, you can click the link for larger loaves of bread.
Pumpernickle Bread-from Bread Machine Recipes
~printable recipe~
3/4 C warm water
1 Tblsp vegetable oil
1/4 C molasses
2 Tblsp cocoa powder
1 1/2 tsp caraway seeds, optional-I added them
1 tsp salt
1 C A/P flour
1/2 C + 2 Tblsp rye flour
1/2 C + 2 Tblsp whole wheat flour
1 Tblsp vital wheat gluten
1 tsp yeast
~Add everything to bread pan, select basic cycle/soft loaf and let 'er rip.
Eat well and have a happy day:@)