Steps
1. Preheat the oven to 350°F (175°C) and grease a small baking dish.
2. In a microwave-safe bowl, melt the chocolate chips and butter together, stirring until smooth.
3. In a separate bowl, whisk together the sugar, flour, baking powder, and salt.
4. Add the melted chocolate mixture, milk, and egg to the dry ingredients, stirring until well combined.
5. Fold in the chopped nuts.
6. Pour the batter into the prepared baking dish and spread it evenly.
7. Bake for 20-25 minutes or until a toothpick inserted into the center comes out with a few moist crumbs.
8. Allow the brownies to cool before cutting into squares and serving.