Preheat oven to 350°F.

Spray a 9 x 13 inch pan with non stick spray. Set aside.

In a large bowl combine the dry crust ingredients: flour, crushed graham crackers, and salt. Mix and set aside.

In another large bowl blend the wet crust ingredients: butter and sugar for 2 minutes. Add in eggs and mix until combined. Then slowly add in the dry crust ingredients and mix again.

Reserve 1 cup of this mixture and set aside.

Spread the remaining crust ingredients evenly into the 9 x 13 inch pan.

Sprinkle chocolate chunks over crust followed by the marshmallows.

By hand scatter clumps of remaining crust over the top. Keep in mind this won't cover the entire pan.

Bake for 30 minutes. Allow to set for 20 minutes then cut and serve. These also taste good after they've completely cooled.

Optional: melt chocolate in the microwave or over the stove top and drizzle over the top.

These bars store well in an airtight container for up to a few days. However they are best the day of.