Preheat your oven to 350°F (180°C) and line a baking sheet with parchment paper.
In a large bowl, use an electric mixer to beat the softened butter, brown sugar, and granulated sugar until the mixture is light and fluffy—this should take about 5 minutes. Next, add the eggs one at a time, mixing well after each addition. Then, stir in the vanilla extract until fully combined.
¾ cups brown sugar, ¼ cup granulated sugar, ¾ cups unsalted butter, 1 tablespoon vanilla extract, 2 eggs
In a separate bowl, sift together the flour, cocoa powder, cornstarch, baking soda, salt, and espresso powder. Gradually add the dry ingredients to the wet mixture, stirring just until everything is combined.
2 cups all-purpose flour, ½ cup cocoa powder, 1 tablespoon cornstarch, 1 teaspoon baking soda, ½ teaspoon salt, ½ teaspoon espresso powder
Scoop the cookie dough into balls about 2 tablespoons each, and place them on the prepared baking sheet. Press chocolate chips into the tops of each dough ball. Bake the cookies for 10 minutes, remove from the oven and allow them to cool on the baking sheet before transferring to a wire rack.
½ cup semi sweet chocolate chips
For the frosting, beat the softened butter, cream cheese, cocoa powder, powdered sugar, and salt with an electric mixer until smooth. Transfer the frosting to a piping bag with a star tip and pipe it onto the cooled cookies in a swirl or flower pattern.
½ cup unsalted butter, ¼ cup cream cheese, ½ cup cocoa powder, 2 cups powdered sugar, ¼ teaspoon salt
Enjoy your homemade Copycat Crumbl Chocolate Cake Cookies!