INGREDIENTS
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5 tablespoons unsalted butter, at room temperature
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3 tablespoons honey
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½ cup granulated sugar
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½ teaspoon vanilla extract
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1 egg yolk
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½ cup rolled oats
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¾ cup all-purpose flour
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¾ teaspoon cornstarch
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½ teaspoon baking powder
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⅛ teaspoon baking soda
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⅛ teaspoon kosher salt
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½ teaspoon ground cinnamon
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¾ cup powdered sugar
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¼ teaspoon ground cinnamon
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splash of milk