Line a cookie sheet with parchment paper.
Melt half of chocolate in a double boiler or microwave safe dish and spread melted chocolate over cookie sheet. Spread to ⅛- to ¼-inch thickness. Place in freezer.
In a large bowl, combine remaining ingredients until creamy. When chocolate has firmed up, smooth peanut butter over the chocolate layer. Return to the freezer.
Melt the remaining chocolate and spread over the peanut butter. Freeze until set. Once set, break into small pieces with a knife. Store in the refrigerator or freezer until ready to serve.
