Fudge Walnut Brownies

Ingredients (9)

• + ½ cup all-purpose flour add to pantry
• + ⅛ teaspoon baking powder add to pantry
• + ⅛ teaspoon salt add to pantry
• + 1 cup white sugar add to pantry
• + ½ cup butter, softened add to pantry
• + 2 eggs add to pantry
• + 2 (1 ounce) squares unsweetened baking chocolate, melted add to pantry
• ✓ ½ teaspoon vanilla extract
• + 1 cup coarsely chopped walnuts add to pantry