"These grown-up lemon bars are made with paper-thin slices of lemon, giving the sweet filling a pleasant bitterness...."
INGREDIENTS
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1 stick plus 2 tablespoons of unsalted butter
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1/2 cup of sugar
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1 large egg yolk
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1 1/2 cups of all-purpose flour
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1/2 teaspoon of baking powder
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1/2 teaspoon of kosher salt
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1 large, firm lemon, scrubbed and halved lengthwise
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1 tablespoon fresh lemon juice
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3/4 cup sugar
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2 tablespoons all-purpose flour
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2 tablespoons unsalted butter, melted
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2 large eggs