Layered Double Chocolate S'Mores Crumble Cookie Bars

INGREDIENTS

Cookie:

3/4 cup

unsalted butter (room temperature)

extra large egg (room temperature)

1 cup

brown sugar

1 tsp

vanilla

2 cups

flour

1 tsp

baking soda

salt

Crumble:

3/4 cup

brown sugar

1/4 cup

white granulated sugar

1 cup

+ 2 Tbsp flour

7 tbsp

unsalted butter (melted)

Toppings:

1 1/4 cups

semi-sweet chocolate chips

1 1/4 cups

white chocolate chips

16 oz

bag of mini marshmallows

1/4 cup

hot fudge sauce

1/2 cup

crumbled graham crackers