GF cake mixes? too expensive for what they are ..
Simple GF cake recipe with homemdae GF flour blend alternative
http://www.landolakes.com/recipe/1312/vanilla-pound-cake-gluten-free-recipe
Note:
As a prospective GF baker, it is necessary to understand two points:
1. always check ALL ingredients for gluten is all it's forms [wheat, rye, barley]
2. cross-contamination and trace-contamination at "kitchen-level" is the major cause of "glutening" in GF consumers ..