*I know the ingredients in this will indeed surprise you.  They sure did me.  There is a group here at the campus I work at (I go to another meeting since this one started after I did) and that is where I got this one.  The lady that gave it to me said it is wonderful and she said you can't taste the beans (which she doesn't like anyway).  I have not tried it yet, so if you do, please let me know how it is.

15 oz pinto beans, rinsed and drained
1 cup baking cocoa (dark can be used)
3/4 cup melted butter
1 Tbsp vanilla
7 1/2 cups confectioners sugar
1 cup chopped walnuts

Mash beans until smooth with fork.  Cover and microwave 1 - 1 1/2 minutes or until heated through.  Add cocoa, butter, and vanilla.  Will be thick.  Slowly stir in sugar and nuts.  Press into 9" pan sprayed with cooking spray.  Cover and refrigerate until firm.  Cut in 1" pieces.  Makes 81 squares.