Here's a site with nice b/c recipes:
http://www.sweetcelebrations.us/Recipes/BUTTERCREAMS.htm
Just use either all shortening or shortening/margarine or all margarine when making frosting - not butter. (Must be Fleischmann's unsalted.)
Substitute water for any milk called for in recipe.
HTH
Here's a post from May 2007 (allergy chatboard) that indicates DH cake mix is not processed in a plant that shares equipment with peanuts:
http://uumor.pair.com/nutalle2/peanutallergy/Forum18/HTML/000541.html
Also, I checked a box on DH yellow cake and didn't see that warning.
However, to err on the side of caution - here's their 800 number: 1-800-362-9834
HTH
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