The Easiest Fudgy Chocolate Brownies Ever

Bahan-bahan (16 porsi)

• 1 cup unsalted butter (melted and cooled)
• 2 tablespoons vegetable oil
• 1 1/4 cups white sugar
• 1 cup light brown sugar (packed)
• 4 eggs (large, at room temperature)
• 1 tablespoon pure vanilla extract
• 3/4 teaspoon salt
• 1 cup all purpose flour
• 1 cup unsweetened cocoa powder (good quality)
• 7 oz large semi-sweet chocolate chips (or roughly chopped chocolate)