Chocolate Pile-Up Cookies

2 cups all-purpose flour

¾ cup unsweetened cocoa powder

1 teaspoon baking soda

1 teaspoon salt

1 cup unsalted butter, at room temperature

¾ cup white sugar

¾ cup brown sugar

2 eggs

2 teaspoons vanilla extract

2 tablespoons coffee-flavored liqueur

1 cup finely chopped toasted hazelnuts

1 cup semisweet chocolate chips

1 cup milk chocolate chips

1 cup white chocolate chips

Preheat an oven to 375 degrees F (190 degrees C). Line baking sheets with parchment paper. In a bowl, mix the flour, cocoa, baking soda, and salt.

Beat the butter, white sugar, and brown sugar together in a bowl with an electric mixer until soft and creamy, then beat in the eggs, vanilla extract, and coffee liqueur. Gradually beat the flour mixture into the butter-sugar mixture until well combined. Stir in the hazelnuts, semisweet chocolate chips, milk chocolate chips, and white chocolate chips until evenly distributed through the dough. Drop by rounded teaspoons, about 2 inches apart, onto the prepared baking sheets.

Bake in the preheated oven until the edges are slightly browned, 8 to 10 minutes. Allow the cookies to cool on the baking sheet for 1 minute before removing to a wire rack to cool completely.