INGREDIENTS
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For the bars: 1/2 cup (1 stick) unsalted butter 2 cups light brown sugar 1/2 cup creamy peanut butter 2 large eggs 1 teaspoon vanilla extract 2 1/2 cups all-purpose flour 1 teaspoon baking powder 1/4 teaspoon baking soda 1/2 teaspoon salt 1 cup diced