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Preheat oven to 375 degrees
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In a bowl whisk flour, baking soda, salt and chocolate chips together; set aside
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Melt butter in a small pan over medium heat. Continue cooking while whisking butter constantly for 3 minutes until butter browns.
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Remove pan from heat and pour butter into a heatproof glass bowl.
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Add both sugars and vanilla to bowl with butter. Whisk until smooth. Add egg and egg yolk and whisk until fully incorporated.
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Using spatula, stir in flour mixture until well combined.
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Drop dough by tablespoonful onto baking sheet lined with parchment paper 3 inches apart.
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Bake cookies for 8-10 minutes.
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Transfer to wire racks to cool completely.