Marmee's Answer:

My daughter that is married uses nut flour exclusively for her baking - and she uses the blender that is with the BOSCH Kitchen Mixer. Using sliced almonds, pecan halves or other nuts -  a little less than a cup at a time - whirl - stop - shake or using a long utensil (BLENDER OFF!!) to get the nuts from clumping around the blades - whirl again...repeat...
t just takes a few times of this to get nice fine nut flour.  The only caution is not to blend it TOO LONG or TOO MUCH or you get Nut Butter and not Nut Flour!

Making nut flour  is also easily accomplished in the food processor with the knife blade but the slicer shredder definitely won't do it. The slicer/shredder is good for shredding large blocks of cheese, slicing up big batches of potatoes for scallopped potatoes, for grating lots of carrots, for shredding cabbage for cole slaw (even though I do that in my blender) - for making oven fries, sweet potato fries etc..as it has a french fry cutter blade. I also use the slicer/shredder to preapre all my cucumbers from my summer garden into nicely sliced bread and butter pickles. Takes only a few minutes it is so fast! Hope this helps. 

Also remember that the Food processor capacity is around 4 cups-- the Slicer/ Shredder around 12 cups--and the Blender around 6 cups--but then you have shape to consider. The blender is tall wheras the other 2 attachments are more bowl like.  But, all in all. I think the Blender attachment to the BOSCH Kitchen Mixer is the best tool for Nut Flour.  And when it comes to nut butter the food processor is best as it is much easier to get your nut butter all scraped out of a bowl type container than a long tall carafe type.