1-Getting Started: First, position your oven racks in the upper-middle and lower-middle spots and preheat to 300 degrees Fahrenheit. Line two rimmed baking sheets with parchment paper to prevent sticking and ensure even baking.

2-Mixing the Dry Ingredients: In a bowl, whisk together 1 cup (5 ounces/142 grams) all-purpose flour, ¼ cup (¾ ounce/21 grams) Dutch-processed cocoa powder, 1 teaspoon baking powder, ¼ teaspoon baking soda, and ¾ teaspoon table salt. Set this aside for later use, as it forms the base of your chocolate brownie cookies.

3-Mixing the Dry Ingredients: Next, handle the chocolate mixture by microwaving 6 ounces (170 grams) of the chopped bittersweet chocolate with 3 tablespoons vegetable oil and 1 tablespoon unsalted butter. Do this at 50 percent power, stirring halfway through, until melted, which takes about 3 minutes. Then, whisk in 2 tablespoons whole milk until smooth.

4-Whipping and Combining: Use a stand mixer with a whisk attachment to whip 1 cup (7 ounces/198 grams) sugar and 2 large eggs on medium-high speed until thick and pale, about 4 minutes. Remove the bowl, add the melted chocolate mixture, and whisk gently by hand until uniform for your chocolate brownie cookies recipe.

5-Whipping and Combining: Fold in the dry ingredients with a rubber spatula until fully incorporated, with no dry spots. Then, add the remaining 4 ounces (113 grams) of chopped bittersweet chocolate to boost the texture.

6-Baking and Cooling: Scoop 10 heaping tablespoon portions of batter onto each prepared baking sheet, making 20 cookies total. Bake for about 16 minutes, switching and rotating the sheets halfway through, until puffed and cracked. The cookies will look slightly underdone between the cracks, which is perfect for that soft and chewy finish.

7-Baking and Cooling: Finally, cool the cookies on the baking sheets for 30 minutes. Remove them with a thin spatula and serve, or store in an airtight container. This method, including baking at a lower temperature, helps achieve the ideal chewy cookies texture. For more baking tips, explore our Biscoff stuffed cookies for variations.