Cookie Brownie Bars

I was browsing Bakerella's blog (which inspired me to get off my giant depressed ass to start baking again) and came across this WONDERFUL idea of combining cookies and brownies!

I went to buy the "ingredients" aka mixes... and smack dab in front of me was this:

So the internal debate began... do I buy separate mixes of brownie and cookie dough, or buy this one with everything I would need to make the same thing?
I went for the separate mixes.