Choc Peanut Butter Slice

200g plain chocolate biscuits (choc ripples)
90g butter melted
60g butter chopped, extra
1/2 cup brown sugar
1 cup smooth peanut butter
1 1/4 cups icing sugar
1/2 cup milk chock bits
150g milk chocolate, melted and cooled slightly

Line the base and sides of an 18x28cm slice pan with baking paper. 
Crush biscuits until fine crumbs.
Add melted butter and mix to combine
Press into base and chill for 10 mins
Melt the chopped butter in saucepan until foamy
Add brown sugar, peanut butter and icing sugar and stir until melted and smooth.
Remove from heat and then stir through choc bits. 
Pour over base chill for 1 hour until firm
Spread chocolate over and chill again for 10 mins until set.