"Makes 16 blondies. Recipe may easily be doubled and baked in a 9x13 pan for 35 minutes. Blondies stay fresh at room temperature for 1 week...."
INGREDIENTS
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1 cup all-purpose flour
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1/2 teaspoon baking powder
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1/8 teaspoon baking soda
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1/2 teaspoon salt
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5 Tablespoons (1/3 cup) unsalted butter, melted
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1 cup light brown sugar, packed
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1 large egg
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1 egg yolk
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1 teaspoon vanilla extract
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1/2 cup Biscoff spread (or Trader Joe's Cookie Butter)
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1 and 1/4 cups white chocolate chips