I know this is late for the OP, but my husband has sent Fairy Tale Brownies to his clients and they've always been received enthusiastically. We've also sent them as thank-yous to people we've worked with (including a realtor and a relocation consultant) who went above and beyond. Having a box of decadent brownies on your desk from a grateful client is a visible sign you're doing your job well.

I've tried them (sent them to my husband when we were dating and before he had cardiac stents) and they're rich and delicious but they lack frosting. I think brownies need frosting!