Here is one from the Sugarcraft board
Not sure if your looking for scratch or doctored mix.. Here's one I've
tried
> and it's really good. It has a great flavor!! I think some people use
Merkens,
> but I prefer real white chocolate... 1 pk White cake mix w/ pudding 4 Egg
> whites 1 1/4 c Water 1 c White chocolate; melted Mix first 3 ingredients
as
> usual. Measure chocolate and then melt. Add to cake batter. Then follow
directions
> on cake box as usual. This is great with raspberry filling. You don't
put
> any oil in it.