Gluten-free chocolate cake (the easiest ever) - George Eats

Ingredients

• 1 cup* (220g) caster sugar
• 1/2 cup* (50g) light brown sugar
• 1 1/4 cup* (210g) fine white rice flour
• 3/4 cup* (75g) dutch processed cocoa powder
• 8g (2 teaspoons) baking powder
• 1 teaspoon baking soda
• 1 1/4 teaspoon salt ((I used table))
• 250ml (1 cup)* milk of choice ((I tested full cream lactose free and soy))
• 1 tablespoon* apple cider vinegar ((see substitution notes))
• 180ml (3/4 cup)* (180ml) vegetable oil ((see substitution notes))
• 60ml (3 tablespoons)* fresh espresso ((see substitution notes))
• 2 teaspoons vanilla bean paste ((see substitution notes))
• 2 extra large eggs (45-55g each, weighed out of shell)
• 250ml (1 cup)* boiling water
• 185 g butter
• 1 1/2 cups of icing sugar
• 3/4 cup of cocoa
• 125ml (1/2 cup)* of milk
• 1/2 teaspoon vanilla bean paste ((optional))
• Pinch of fine salt