Best Fudgiest Brownies - Hart & Hunter

Ingredients

• 1 cup unsalted butter, melted and cooled
• 2 tablespoons (30ml) vegetable oil
• 1 1/4 cups white sugar
• 1 cup packed light brown sugar
• 4 large eggs, at room temperature
• 1 tablespoon pure vanilla extract
• 3/4 teaspoon salt
• 1 cup all purpose flour
• 1 cup good quality, unsweetened cocoa powder
• 200g roughly chopped chocolate or large chocolate chips