Best Fudgy Cocoa Brownies

Bahan-bahan (16 porsi)

• 1/2 cup unsalted butter* (melted and HOT)
• 1 tablespoon cooking oil (olive oil or coconut oil are fine)
• 1 1/8 cup granulated sweetener or superfine sugar** (caster sugar or white granulated sugar)
• 2 large eggs
• 2 teaspoons pure vanilla extract
• 1/2 cup all purpose flour (or plain flour)
• 1/2 cup unsweetened cocoa powder
• 1/4 teaspoon salt