Ingredients

• Unsalted butter - 1 cup
• Semi-sweet chocolate chips - 1 cup
• Granulated sugar - 1 cup
• Brown sugar - ½ cup
• Vanilla extract - 2 teaspoons
• Large eggs - 3
• All-purpose flour - ¾ cup
• Cocoa powder - ¼ cup
• Salt - ½ teaspoon
• Baking powder - ½ teaspoon
• Walnuts (optional) - ½ cup, chopped

Instructions

1. 1.

   Preheat the oven to 180°C (350°F). Grease a 9x13 inch baking pan.

2. 2.

   Melt the butter and chocolate chips together in a microwave-safe bowl, stirring until smooth.

3. 3.

   Stir in the granulated sugar, brown sugar, and vanilla extract until well combined.

4. 4.

   Add eggs one at a time, beating well after each addition.

5. 5.

   In a separate bowl, whisk together the flour, cocoa powder, salt, and baking powder.

6. 6.

   Gradually fold the dry ingredients into the wet mixture until just combined. Do not overmix.

7. 7.

   Gently fold in the walnuts, if using.

8. 8.

   Pour the batter into the prepared pan and spread evenly.

9. 9.

   Bake for 25-30 minutes, or until a toothpick inserted into the center comes out with a few moist crumbs.

10. 10.

    Allow to cool in the pan on a wire rack before cutting into squares.

Nutritional Facts