The only ingredient in this bark that is measured is the white vanilla bark which is also known as white almond bark or white confectionary coating. DO NOT use white chocolate chips or other white types of chips because they will not melt for pouring or spreading. Yes, they get soft, but not soft enough to pour. The coating needs to be designed to pour when melted.
For the M&M’s, I bought a bag of the mini’s and picked out the red and blue ones. It was not tedious at all, especially since I was relaxing while watching a favorite TV show. My daughter, Katie, had dropped by the house and hung out beside me like a kid, waiting for me to find the malformed M&M’s so that she could dispose of them for me. She was so helpful!
One of the best tips that I can give you for this bark is to put a goodly amount of broken pretzels in it. The bark is very sweet and the saltiness of the pretzels balances the sweetness. The first time I made this bark I did not use enough solids for the base, ending up with too much of the white topping and not enough crunchy stuff to keep it all interesting.