"White Chocolate Blondies are soft and chewy dessert bars that are made with lots of white chocolate chips...."
INGREDIENTS
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1 cup (226g) unsalted butter
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11 ounces white chocolate chips, (divided)
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1¾ cups (350g) granulated sugar
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2 large eggs + 1 egg yolk, (room temperature)
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1½ teaspoons vanilla extract
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2½ cups (285g) all-purpose flour
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2 teaspoons cornstarch
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1 teaspoon baking powder
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1 teaspoon kosher salt