Preheat oven to 350 degrees farenheit. Line an 8x8 pan with foil.

To make crust, crumble crackers in a food processor, add the flour, brown sugar and butter, process until it resembles fine meal.

Add the egg and mix only until moist. Transfer to pan and press into the bottom.

Bake for 20 minutes and let cool completely.

To make toppingplace cream in a saucepan and bring to a simmer. Remove from heat and add the chocolate, stir until smooth and completely melted.

Mix in the marshmallows and pour on top of the crust and spread evenly.

Chill for 2 hours and remove from pan and foil. cut into 2 inch squares. Keep refrigerated.