These thick and chewy chocolate chip cookies are the result of two years of testing. With melted butter, an extra egg yolk, and a perfect sugar ratio, they deliver bakery-quality results with simple pantry ingredients and no chill time required.
For thicker, chewier cookies, chill the dough for at least 2 hours or up to 72 hours. The longer chill allows flavors to meld and flour to fully hydrate. If baking chilled dough, add 1-2 minutes to baking time. Let dough sit at room temperature for 10 minutes if rock hard. Use room temperature eggs to prevent butter from seizing. Rotate baking sheet halfway through for even browning. Store baked cookies in an airtight container at room temperature for up to 5 days with a slice of bread to keep them soft. Freeze baked cookies for up to 3 months or cookie dough balls for up to 3 months.
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