INGREDIENTS
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2 sticks unsalted butter, melted
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1 c. powdered sugar
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1 1/2 c. creamy peanut butter, divided into 1 c and 1/2 c
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2 1/2 c. graham crackers, crushed
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1/2 tsp. coarse sea salt, plus more for topping bars
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2 c. miniature semisweet chocolate chips, divided into 1 1/2 c and 1/2 c