INGREDIENTS
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4 c. all-purpose flour, spooned and leveled
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3/4 tsp. Kosher salt
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1/4 tsp. baking soda
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1/4 tsp. cream of tartar
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3 1/2 tsp. ground cinnamon, divided
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1 c. unsalted butter, at room temperature
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1 c. canned sweet potato puree
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2/3 pt. confectioners' sugar
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2 tsp. pure vanilla extract
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1 1/2 c. granulated sugar, divided
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2 large eggs
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1 (13.4-oz.) can dulce de leche