
Crust:
6 tablespoons unsalted butter, melted
1 1/2 cups crushed biscuit crumbs
2 tablespoons sugar
Pinch fine salt
Brownie:
115g unsalted butter
115g dark chocolate, chopped
1 cup packed light brown sugar
3/4 cup white sugar
1 1/2 teaspoons pure vanilla extract
1/2 teaspoon fine salt
4 large cold eggs
1 cup cake flour
Topping:
4 cups large marshmallows