Butter an 8 x 8 baking dish

Next add the butter to a large pot and brown the butter over medium heat, stirring constantly, until a deep golden brown color (about 5 minutes)

Remove from the heat and add in your marshmallows, stirring until melted

Then add in your pistachio spread, vanilla and salt until melted and combined

Add your rice crisps and work quickly and mix well

Press the mixture into your prepared dish

Set aside while you melt your chocolate and Pistakio spread in 20 second increments in the microwave (or you could use a double boiler to melt the chocolate), stirring between each go around. *Be extra cautious, as white chocolate could burn if too high heat in the microwave*

Spread evenly over the treats and top with chopped pistachios

Let the chocolate set completely before slicing or enjoy right away for a ooey gooey treat!