for crust:
1 1/2 cups graham cracker crumbs
1/2 stick butter
pinch of salt
Preheat oven to 350 degrees.

Cake:
1 1/8 cups all purpose flour
1/4 cup dark cocoa powder
1 1/4 teaspoon baking soda
1/2 teaspoon salt
3/4 cup brown sugar
1 egg
1 teaspoon vanilla extract
1/2 cup milk
1/2 cup + 1 tablespoon heavy cream
1/2 cup butter, melted
2 tablespoons sour cream

for topping:
1 bag of large marshmallows