1. Preheat your oven to 350°F (175°C).
2. In a microwave-safe bowl, melt the dark chocolate chips and butter together until smooth.
3. Stir in the granulated sugar until well combined.
4. Add the eggs one at a time, mixing well after each addition.
5. Mix in the vanilla extract.
6. In a separate bowl, whisk together the flour, salt, and baking powder.
7. Gradually add the dry ingredients to the chocolate mixture, stirring until just combined.
8. If using, fold in the chopped nuts.
9. Drop spoonfuls of the dough onto a lined baking sheet.
10. Bake for 10-12 minutes or until the edges are set.
11. Let cool on the baking sheet for a few minutes before transferring to a wire rack to cool completely.

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