1. Preheat your oven to 350°F (175°C).
2. In a large bowl, cream together the softened butter, brown sugar, and granulated sugar until smooth.
3. Add the eggs one at a time, mixing well after each addition, then stir in the vanilla extract.
4. In another bowl, whisk together the flour, baking soda, and salt.
5. Gradually add the dry ingredients to the wet ingredients, mixing until just combined.
6. Fold in the dark chocolate chunks and orange zest.
7. Drop rounded tablespoons of dough onto a baking sheet lined with parchment paper.
8. Bake for 10-12 minutes or until the edges are golden brown.
9. Let the cookies cool on the baking sheet for a few minutes before transferring them to a wire rack to cool completely.

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