Gooey Center Chocolate Chip Cookies Step-by-step instructions

Before you start

Before starting, measure all ingredients and cut the butter into small cubes, then return it to the refrigerator until ready to use. Line two baking sheets with parchment paper.

Heat the oven to 380°F (193°C) when ready to bake. Have the chocolate chunks chopped and the flaky salt nearby. The dough comes together quickly, so having everything prepped ensures a smooth process.

Instructions

Mix the Dough

1. 1Cream the Butter and Sugars
   In a large mixing bowl, combine the cold cubed butter, dark brown sugar, and granulated sugar. Beat on medium speed until just combined and dense, about 1 minute. Add the egg, egg yolk, and vanilla bean paste, and beat until the mixture is thick and cohesive, scraping down the bowl as needed.
   Look for The mixture should look like a thick, glossy paste with no visible butter chunks.
   Tip Keep the butter cold; it helps the cookies stay thick and gooey in the center.
2. 2Add the Dry Ingredients
   Sift the all-purpose flour, cornstarch, espresso powder, and baking soda together over the butter mixture. Fold with a rubber spatula until just a few streaks of flour remain. Add the rough-chopped dark chocolate chunks and fold until evenly distributed.
   Look for The dough should be dense and slightly shaggy, with chocolate chunks visible throughout.
   Tip Do not overmix; overworking the dough can make the cookies tough.
3. 3Shape the Dough
   Scoop the dough into 8 equal portions. Shape each into a tall, craggy mound, about 3 inches wide and 2 inches high. Place the mounds on parchment-lined baking sheets, spacing them at least 3 inches apart.
   Look for The mounds should be tall and uneven on top, not smooth balls.
   Tip Chilling the shaped dough for 30 minutes before baking helps prevent spreading, but it's optional.

The dough should be dense, slightly sticky, and full of chocolate chunks. It should hold together when pressed, but not be overly smooth.

The butter and sugars should be well combined, with no streaks of flour. The dough will look more like a thick paste than a fluffy batter.

Bake to Perfection

4. 4Bake the Cookies
   Heat the oven to 380°F (193°C). Bake the cookies for 11 minutes, until the edges are deep golden brown and caramelized, while the centers remain tall and soft. The tops may look slightly underdone; that's the goal.
   Look for The edges should be set and browned, and the centers should look puffed and slightly glossy.
   Safe temperature 160°F (71°C) internal temperature (egg dishes)
   Tip Bake one sheet at a time on the middle rack for even browning.
5. 5Sprinkle with Salt
   Remove the baking sheets from the oven and immediately sprinkle the hot cookies with flaky sea salt. Let them cool on the baking sheet for 5 minutes, then transfer to a wire rack to cool completely.
   Look for The salt crystals should glisten on the surface, and the edges should be crisp.
   Tip The salt balances the sweetness and enhances the chocolate flavor.

The cookies will spread slightly but remain tall. The edges will turn deep golden brown and caramelize, while the centers stay pale and puffed. The kitchen will smell of butter and chocolate. The tops may crack slightly, showing the gooey interior.

Finish and Serve

6. 6Break and Serve
   Serve the cookies warm or at room temperature. To show off the gooey center, break one open and watch the melted chocolate stretch. Enjoy with a glass of cold milk.
   Look for The center should be soft and fudgy, with melted chocolate pooling.
   Tip If the cookies have cooled completely, reheat in a 350°F oven for 3-4 minutes to restore the gooey texture.

After sprinkling with salt and cooling, the cookies should have crisp edges and soft, fudgy centers. When broken, the chocolate should stretch and ooze. The texture should be chewy and tender, not cakey or dry.

Common mistakes

A common mistake is overmixing the dough, which develops gluten and leads to tough cookies. Mix until just combined.

Another issue is baking too long, which dries out the centers; pull the cookies out when the edges are brown but the centers are still soft. Also, don't flatten the dough mounds; keeping them tall ensures a thick, gooey middle.

How to tell it’s done

The cookies are done when the edges are deep golden brown and set, while the centers still look slightly soft and puffy.

The internal temperature of the cookies should reach at least 160°F (71°C) to ensure the eggs are fully cooked, even though the centers will appear underdone. Cool on the baking sheet for 5 minutes before moving; they will continue to set as they cool.

• Egg dishes: 160°F (71°C) in the thickest part