These thick and soft dark chocolate cookies are made in one bowl without a mixer! These cookies are made with Dutch-processed cocoa powder, making them extra chocolatey and rich. Each cookie is then loaded up with semi-sweet chocolate chips and this easy homemade recipe makes 9 large cookies! After a bunch of testing, I made sure these cookies could be made without a stand mixer or hand mixer. Instead, they're made in one bowl and a whisk. Perfect for when you have that cookie craving, but don't want to do a bunch of dishes!
Melt the butter in a medium saucepan or microwave-safe bowl. Let it cool for a few minutes so it is warm but not hot.
1 stick unsalted butter
Add the melted butter, brown sugar, and granulated sugar to a large mixing bowl. Whisk vigorously for 1–2 minutes, until the mixture is smooth, glossy, and well combined. There should be no obvious pools of butter.
¾ cup light brown sugar, 2 tablespoons granulated sugar
Whisk in the egg, egg yolk, and vanilla until the mixture is smooth and slightly thickened, about 30–60 seconds.
1 large egg, 1 large egg yolk, 2 teaspoons vanilla extract
Add the flour, cocoa powder, baking soda, salt, and espresso powder. Use a rubber spatula to fold everything together until you no longer see streaks of flour.
1 cup + 6 tablespoons all-purpose flour, ⅓ cup Dutch-process cocoa powder, 1 teaspoon baking soda, ½ teaspoon fine salt, ½ tsp instant espresso powder
Fold in the chocolate chips, reserving a few pieces for pressing onto the tops of the cookies after baking.
1 cup semi-sweet chocolate chips
Cover the bowl and refrigerate for at least 1 hour, preferably 2 hours. The dough should be firm and scoopable. Don't worry if at first it looks like brownie batter! It will thicken up in the fridge.
Preheat to 175°C / 350°F. Line two baking sheets with parchment paper.
Divide the dough into 75-80 gram portions, or use a large cookie scoop and do a heaping scoop. . Roll each portion into a ball, then gently shape it so it is taller than it is wide. Don't flatten the dough, we want these cookies to bake up thick!
Place the chilled dough balls on the baking sheet, leaving plenty of room between them. Bake for approximately 9-12 minutes.
The edges should look set, but the centers should still look soft and slightly underbaked. Don't wait for the centers to look completely done.
Immediately press a few reserved chocolate chips into the tops of the cookies while they're still hot.
Leave the cookies on the baking sheet for 10 minutes before transferring them to a wire rack to cool.