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Heat the oven to 350ºF.
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Line a 9x9-inch baking pan with foil, leaving extra foil extending over the edges.
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Spray the foil with nonstick cooking spray.
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In a medium bowl, stir together graham cracker crumbs and melted butter until crumbs are moistened.
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Stir in the miniature chocolate chips.
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Press into the bottom and 1-inch up the sides of the pan.
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Bake for 6 min or until set, and cool on a wire rack.
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Decrease oven to 325ºF.
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In a large bowl, beat the cream cheese and 1/4 cup sugar at low speed until smooth.
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Beat in the egg and 1 tsp vanilla until just blended.
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Pour the filling into the prepared crust.
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In the same large bowl, beat 5 Tbs butter, brown sugar, 3 Tbs sugar, 1 tsp vanilla and salt at medium speed for 1 min or until blended.
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Beat in the flour at low speed just until incorporated.
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Stir in 1 cup of chocolate chips by hand.
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Drop teaspoonfuls of the dough over the filling.
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Bake for 30-35 min or until the top feels dry and looks set when shaken gently.
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Cool completely on a wire rack.
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Dip a fork into the melted chocolate chips and drizzle over the top of the bars.
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Let stand until set.
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Using the foil edges, lift bars from the pan; peel away the foil.
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Cut into 16 pieces and serve at room temperature.
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Cover and refrigerate any leftovers.