Melt half of the chocolate candy coating according to the package directions, then spread over parchment paper or a silpat-lined cookie sheet. Spread to a large rectangle, but not too thin – approximately 1/8″ to 1/4″ thickness. Place in freezer to firm up.
In a large bowl, beat together the peanut butter, Confectioners’ sugar, melted butter and vanilla extract until smooth and creamy. Remove first chocolate layer from the freezer and spread the peanut butter mixture over the top. Return to the freezer and melt the remaining chocolate candy coating. Once that is melted, spread it over the top of the peanut butter layer and freeze until set.
Break up the bark into small pieces using a butcher knife. Store in the refrigerator or freezer until ready to serve. (Doesn't have to be kept in fridge or freezer, but I prefer my candy cold).
In place of chocolate candy coating, you can use 20 oz semi-sweet chips per 4 to 6 oz block of paraffin wax, will perform like almond bark, however, have a better taste, less waxy tasting.