Here's a link for several biscotti recipes from cake mix.

http://www.multifoodsbakery.com/recipes/tpl_recipes.asp?catid=c_566

Almond Deluxe Dark Chocolate Biscotti
Almond Deluxe Devil's Food Biscotti
Almond Deluxe German Chocolate Biscotti
Almond Deluxe White Biscotti
Almond Deluxe Yellow Biscotti
Chocolate Chip Deluxe Dark Chocolate Biscotti
Chocolate Chip Deluxe Devil's Food Biscotti
Chocolate Chip Deluxe German Chocolate Biscotti
Chocolate Chip Deluxe White Biscotti
Chocolate Chip Deluxe Yellow Biscotti
Hazelnut Deluxe Dark Chocolate Biscotti
Hazelnut Deluxe Devil's Food Biscotti
Hazelnut Deluxe German Chocolate Biscotti
Hazelnut Deluxe White Biscotti
Hazelnut Deluxe Yellow Biscotti
Pecan Deluxe Dark Chocolate Biscotti
Pecan Deluxe Devil's Food Biscotti
Pecan German Chocolate Deluxe Biscotti
Pecan White Deluxe Biscotti
Pecan Yellow Deluxe Biscotti
Pine Nut Deluxe Dark Chocolate Biscotti
Pine Nut Deluxe Devil's Food Biscotti
Pine Nut Deluxe German Chocolate Biscotti
Pine Nut Deluxe White Biscotti
Pine Nut Deluxe Yellow Biscotti
Walnut Deluxe Dark Chocolate Biscotti
Walnut Deluxe Devil's Food Biscotti
Walnut Deluxe German Chocolate Biscotti
Walnut Deluxe White Biscotti
Walnut Deluxe Yellow Biscotti
White Chocolate Chip Deluxe Dark Chocolate Biscotti
White Chocolate Chip Deluxe Devil's Food Biscotti
White Chocolate Chip Deluxe German Chocolate Biscotti
White Chocolate Chip Deluxe White Biscotti
White Chocolate Chip Deluxe Yellow Biscotti