Pre-heat oven to 350F (180C), line 1-2 large baking sheets with parchment paper.
In a medium bowl whisk together the flour, baking powder and salt.
In a large bowl beat on medium speed the butter and sugar until light and creamy approximately 3-5 minutes, then add the egg, vanilla and melted cooled chocolate and beat to combine.
Add the dry ingredients to the creamed butter mixture and combine with the flat beaters or with a wooden spoon or spatula, then fold in the walnuts and chocolate chips.
Drop by heaping tablespoons or a small/medium cookie scoop on the prepared baking sheets and bake approximately 10 minutes. Let cool 10 minutes on the baking sheet then move to a wire rack to cool completely before serving. Enjoy.
Notes
How to store these cookies?
Ensure your cookies have cooled completely before storing them in an airtight container at room temperature for up to one week. For longer storage you can also freeze them in a zip-top bag for 1 month up to 3 months. Thaw at room temperature and for that freshly baked cookie taste, heat them up for 3 minutes at 350°F.
Can I freeze the cookie dough?
Yes! Once the walnut chocolate chip cookies dough is scooped onto the baking sheet, flash freeze the cookie dough balls until solid. Transfer to a freezer safe bag and store in the freeze for up to 30 days. Bake from frozen adding a few minutes to the baking time.