Walnut Chocolate Cookies have a rich chocolatey flavour which is dense and moist like a cake. The walnuts are toasted and add flavour and crunch. Drizzled with melted white chocolate and topped with chocolate sprinkles, these cookies are absolute decadence and perfect for a holiday cookie platter!
Preheat your oven to 350 degrees F. Line a baking sheet with parchment paper and set aside.
In a large mixing bowl, beat the butter and both sugars until light and fluffy.
Add the egg yolks and vanilla extract. Beat until combined.
Measure in the flour, cocoa, and baking soda. Beat until combined. Fold in the walnuts with a rubber spatula.
Portion the dough into 2-tablespoon amounts. Roll each portion into a 2-inch log and set the logs onto the prepared baking sheet.
Use a fork and make long lines into the logs by lightly dragging the tines of the fork back and forth over the top of each log.
Bake the logs for 20 minutes.
Remove the cookies from the oven and transfer them to a wire cooling rack to cool.
Once cooled, melt the white chocolate chips in a microwave safe bowl in 30-second increments at half power. Stir well between each increment until the chocolate is melted and smooth.
Transfer the chocolate to a piping bag or a sandwich bag. Cut a small tip from one lower corner. Hold the bag over the cookies and drizzle each cookie with the desired amount of chocolate. Immediately top the cookies with chocolate sprinkles.
Once the chocolate is firm, transfer the cooking to a food-safe container with a tight-fitting lid and store them at room temperature.