Magnolia Kitchen red velvet cakes with vanilla cream cheese icing

Name: Magnolia Kitchen red velvet cakes with vanilla cream cheese icing
Prep time: 20 min
Cook time: 1 h 15 min
Total time: 1 h 15 min
Yield: 12 pieces
Ingredients: 120 g buttermilk; 1 egg; ½ tsp natural red food colouring; 150 g plain flour; 150 g caster sugar; 30 g cocoa powder; 65 g salted butter; 2 tsp apple cider vinegar; 1 tsp bicarbonate of soda; 150 g salted butter; 150 g cream cheese; 50 g icing sugar; ½ tsp natural vanilla extract; ¼ tsp vanilla bean paste