Put parchment paper in an 8x8 inch pan and set aside.

Put unsalted butter, caramel sauce and marshmallow in a large pan, stir at a medium heat for about 5 minutes, until it melts. Remove from heat.

Add vanilla extract, crispy rice and pretzels and mix well. Spread the mixture evenly in the baking pan.

Using a firm object, or your hands, shape the mixture well. You might even want to oil your hands, if the mixture is sticky. Leave it to cool.

Meanwhile, prepare chocolate frosting. Put pieces of chocolate in a smaller pan. Pour some water in a larger pan.

Put smaller pan on the larger one (it mustn't touch the bottom) and melt the chocolate,at a medium heat, stirring from time to time.

Add whipping cream and mix well.

Leave it to cool for a minute or two and spread over the Crispy Rice Treats.

Sprinkle with pretzel bits.