Combine all ingredients except the peanut butter and whisk until smooth.
Stir in half of the peanut butter and whisk again until smooth.
Pour mixture into parchment lined 9x9 pan evenly.
Using a spoon, drizzle the rest of the peanut butter over the bark and swirl it into the chocolate.
Freeze for about 30-45 minutes or until set.
Break into pieces.
Store in the refrigerator.