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1
Set a pizza stone on the bottom of the oven and set a rack on the top shelf.
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2
Preheat the oven to 500 and heat the stone for at least 45 minutes.
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3
In a food processor, combine the crumbled graham crackers with the brown and granulated sugars and the butter, vanilla and salt.
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4
Process the mixture to fine crumbs.
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5
On a lightly floured work surface, roll out each piece of pizza dough to a 12-inch round.
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6
Transfer 1 round of dough to a lightly floured pizza peel.
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7
Very lightly drizzle the round with vegetable oil and gently rub the oil over the dough.
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8
Slide the dough onto the hot stone and bake for about 2 minutes, until it starts to brown on the bottom and puff on top.
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9
Using 2 large spatulas, remove the pizza crust and sprinkle it with half of the graham cracker crumbs, half of the chocolate and half of the marshmallows.
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10
Return the pizza to the stone and bake for 1 minute.
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11
Transfer the pizza to the top shelf of the oven and bake for about 1 minute, until the marshmallows are browned.
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12
Sift confectioners' sugar on top.
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13
Cut the pizza into wedges and serve right away.
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14
Repeat with the remaining dough, oil, graham cracker crumbs, chocolate and marshmallows to make a second pizza.