The Best Double Chocolate Chip Cookie Bars Recipe

0 Preheat your oven to 350°F. To prevent sticking, either lightly grease a 9x9-inch baking pan or line it with parchment paper, making sure the edges hang over the sides for easy removal.
1 In a medium bowl, whisk together the flour, cocoa powder, baking soda, and sea salt until evenly combined. Set aside.
2 In a large mixing bowl, beat the softened butter, brown sugar, and granulated sugar for about 1 ½ minutes, or until the mixture looks light and fluffy. Add the vanilla extract, egg, and egg yolk, mixing just until everything is incorporated.
3 Gradually add the dry ingredients to the wet mixture, stirring until just combined. Be careful not to over-mix, as this can affect the texture.
4 Fold in the chocolate chips, ensuring they’re evenly distributed throughout the dough.
5 Transfer the cookie dough to the prepared baking pan, using a rubber spatula to spread it out into an even layer.
6 Bake for 25-30 minutes, or until the edges are set and a toothpick inserted into the center comes out clean or with a few moist crumbs. The bars will continue to firm up as they cool, but should stay soft and chewy in the center. Once out of the oven, sprinkle with extra chocolate chips on top while still warm.
7 Allow the bars to cool completely in the pan before slicing into squares, bars, or triangles for clean, neat cuts.