Gluten-free cinnamon doughnuts

• oil spray, to grease

Cinnamon sugar

• 50 g caster sugar
• 1 tsp ground cinnamon

Doughnuts

• 160 g gluten free plain flour
• 60 g brown sugar
• 1 tsp gluten free baking powder
• 1 pinch salt
• 1 tsp ground cinnamon
• 1 egg
• 1 tsp natural vanilla extract
• 65 g grapeseed oil
• 90 g full cream milk
• 1 tsp apple cider vinegar