"This funfetti blondies recipe features deliciously chewy brown sugar and vanilla-laced cake batter-flavored cookie bars...."
INGREDIENTS
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10 tablespoons unsalted butter (melted and cooled slightly)
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1/2 cup granulated sugar
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1/4 cup light brown sugar (lightly packed)
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1 large egg
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1 1/2 teaspoons pure vanilla extract
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1/2 teaspoon cake batter flavor (see Notes)
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1 cup all-purpose flour
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1/4 teaspoon salt
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5 tablespoons rainbow sprinkles (divided)
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2/3 cup unsalted butter (at room temperature)
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2 cups powdered sugar (sifted)
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5 teaspoons heavy whipping cream (or more as needed)
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1 teaspoon pure vanilla extract
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1/8 teaspoon salt