Smores Brownie Pie

INGREDIENTS:

1/2 cup unsalted butter (1 stick)
2 ounces dark chocolate, coarsely chopped (I used Trader Joe's 72% Pound Plus Bar)
1/4 cup unsweetened natural cocoa powder
2 large eggs
1 cup granulated sugar
1 teaspoon vanilla extract
1 teaspoon instant espresso granules, optional but recommended
1/2 cup all-purpose flour
3/4 cup semi-sweet chocolate chips
about 8 ounces large marshmallows, enough to cover pan completely
about 2 tablespoons graham cracker crumbs (half of 1 graham cracker, crushed in your fist)

DIRECTIONS:

1. Preheat oven to 350F. Spray a 9-inch pie dish with cooking spray; set aside.
2. In a medium, microwave-safe bowl combine the butter, chopped chocolate, cocoa powder, and heat to melt, about 45 seconds on high power. Stop to check and stir. Heat in 10-second bursts as necessary until mixture can be stirred smooth; set aside.
3. In a  large mixing bowl, lightly whisk together the eggs and sugar.
4. Whisk in the vanilla.
5. Add the chocolate mixture to the egg-sugar mixture and whisk to combine.
6. Optionally whisk in the espresso granules. It doesn't make the brownies taste like coffee and intensifies the chocolate flavor; omit if you're concerned.
7. Stir in the flour until just combined; don't overmix.
8. Turn batter out into prepared pan, smoothing the top lightly with a spatula.
9. Bake for about 26 minutes, or until a toothpick inserted in the center comes out mostly clean, or with a few moist crumbs, but no batter.
10. Turn broiler to high power. Keep the oven rack in the middle of the oven, not up high where you'd normally broil things because it's safer in the middle; the marshmallows are less likely to char.
11. Evenly sprinkle the chocolate chips over brownie.
12. Evenly sprinkle the marshmallows.
13. Broil for about 1 minute, or until marshmallows are golden and puffed. Keep an incredibly close eye on them so they don't burn because broilers are extremely unforgiving. I broil on the middle rack, with the oven door open, and stare into the oven the entire time and jostle the pie dish around to aim the broiler on specific patches I want more or less toasted.
14. Remove from oven and evenly sprinkle with graham cracker crumbs before serving. Serve as soon as it's comfortably cooled, or allow to cool completely before serving. Pie will keep airtight at room temperature for up to 5 days.