While brownies are cooling, spread on the jam and freeze a few minutes.
For the filling, Beat 5 T. plus 1 tsp. butter, peanut butter and sugar till fluffy.
Spread over chilled jam and return to freezer.
Microwave the remaining 2 T. butter and the chocolate until smooth.
Pour over the peanut butter layer and freeze 30 mins.
Drizzle with melted peanut butter if desired.