Carrot Cake Truffles

prepared carrot cake (13x9" pan, no frosting)

cream cheese frosting (

recipe here

)

bag (12 ounces) pure white candy melts

bar (4 ounces) white chocolate baking bar, roughly chopped

vegetable shorting (Crisco)

orange candy melts (I used a combination of orange and yellow.)

Carrot sugar candies, optional