Using a stand mixer fitted with the paddle attachment or a hand mixer, combine peanut butter, crushed graham crackers and melted butter. Mix until combined.
Add 2 cups of powdered sugar, mix until combined.
Add remaining powdered sugar, ½ cup at a time, until you have reached desired consistency (usually 3-4 cups total).
Roll the mixture into 1-inch balls and chill or freeze until firm (1 hour minimum).
Line a cookie sheet with parchment paper, set aside.
Melt almond bark in the microwave and use it to coat the peanut butter balls. Place the coated balls on the cookie sheet lined with parchment paper and allow the chocolate to harden.
Store in a sealed container at room temperature or in refrigerator.