Ingredients
- ½ cup unsalted butter, melted
- 1 tablespoon cooking oil (olive oil or coconut oil are fine)
- 1⅛ cup superfine sugar (caster sugar)*
- 2 large eggs
- 2 teaspoons pure vanilla extract
- ½ cup all-purpose | plain flour
- ½ cup unsweetened cocoa powder
- ¼ teaspoon salt