Follow these steps carefully in a single large bowl. The order of operations is designed to build the dough’s structure correctly and ensure all ingredients are perfectly incorporated without overworking the flour.

1. Combine Wet Ingredients: In a large, microwave-safe mixing bowl, melt the butter. Be careful not to let it get too hot; it should be just melted. To the same bowl, add the packed light brown sugar and granulated sugar. Whisk vigorously for about 1-2 minutes. The mixture should look like a glossy, grainy caramel sauce. This step is crucial for dissolving the sugars into the fat, which is the foundation for a chewy cookie.
2. Incorporate Eggs and Vanilla: Add the two room-temperature large eggs and the vanilla extract to the butter and sugar mixture. Whisk everything together until the mixture is smooth, glossy, and has lightened slightly in color. You should not see any streaks of egg yolk. This emulsifies the fats and liquids, creating a stable base for the dough.
3. Add Dry Ingredients: Sprinkle the all-purpose flour, baking soda, and salt directly on top of the wet ingredients in the bowl. There is no need to pre-mix them in a separate bowl. Using a rubber spatula or wooden spoon, gently fold the dry ingredients into the wet. Mix only until the last streaks of flour have just disappeared. It is critical not to overmix at this stage. Overmixing develops the gluten in the flour, which can result in tough, dense, and cakey cookies instead of soft and chewy ones. The dough will be very soft and seem a bit greasy—this is normal.
4. Fold in the Chocolate Chips: Pour the semi-sweet chocolate chips into the dough. Gently fold them in with your spatula until they are evenly distributed throughout the dough. Again, be careful not to overmix. Just a few folds are all that is needed.
5. Rest the Dough (Optional but Recommended): For the absolute best flavor and texture, cover the bowl with plastic wrap and let the dough rest on the counter for 30 minutes, or in the refrigerator for up to 72 hours. This resting period allows the flour to fully hydrate and the flavors to meld, resulting in a deeper caramel flavor and a less greasy, chewier final product. If you’re short on time, you can skip this step, but even a 30-minute rest makes a noticeable difference.
6. Preheat and Prepare: While the dough is resting, preheat your oven to 375°F (190°C). Line two large baking sheets with parchment paper or silicone baking mats. This prevents the cookies from sticking and promotes even browning on the bottom.
7. Scoop and Bake: Using a medium cookie scoop (about 1.5 to 2 tablespoons), portion out balls of dough and place them on the prepared baking sheets, leaving about 2-3 inches of space between each one to allow for spreading. Do not flatten the dough balls; they will spread perfectly on their own.
8. Bake to Perfection: Bake for 10-12 minutes. The key to a chewy cookie is to slightly underbake it. The cookies are done when the edges are set and a light golden brown, but the centers still look slightly soft and underdone. They will continue to cook on the hot pan after you remove them from the oven.
9. Cooling is Crucial: Remove the baking sheets from the oven. If you like flatter, chewier cookies with a wrinkled top, you can gently bang the pan on the counter a couple of times right after it comes out of the oven. Let the cookies cool on the baking sheet for 5-10 minutes. This allows them to set up enough to be moved without falling apart. After 10 minutes, transfer the cookies to a wire rack to cool completely.