INGREDIENTS
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2 sticks or 1 cup chilled Butter (I used Kerry Gold Irish Butter)
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1/2 cup White Granulated Sugar
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1 cup Dark Brown Sugar
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2 large cold Eggs
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2 c. All Purpose Flour
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1 c. Cake Flour
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1 tsp Kosher Salt
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1 tsp. Baking Powder
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1/4 tsp. Baking Soda
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1 tbsp. Corn Starch
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1 c. 60% Bittersweet Chocolate Chips
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1 c. Milk Chocolate Chips
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1 c. toasted chopped Walnuts