INGREDIENTS
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1 cup salted butter, diced into cubes
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2 1/4 cups all-purpose flour
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2 tsp cornstarch
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1 tsp baking powder
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1/4 tsp baking soda
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1/4 tsp salt
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1/2 cup granulated sugar
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1/2 cup packed light-brown sugar
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1 large egg
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1 large egg yolk
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2 tsp vanilla extract
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1/4 cup granulated sugar, for rolling cookies
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1/4 cup + 2 Tbsp caramel sauce or caramel ice cream topping (I used Hershey's)
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1/4 cup butter, softened
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1/2 tsp vanilla extract
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2 cups powdered sugar
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3/4 tsp coarse sea salt, divided