Vegan Cupcakes with Rainbow Frosting (Plantiful Bakery) are made with plant milk and apple cider vinegar, with sea salt to balance the sweetness of the batter. Vegan yoghurt or applesauce adds moisture and the recipe uses palm-oil-free vegan butter and vegan cream cheese, plus vegan powdered sugar. Natural vanilla completes the ingredients.
The rainbow frosting uses natural food dyes. You can use matcha powder for green, spirulina for blue (not for autoimmune or bleeding disorders or PKU disease), turmeric for yellow, freeze-dried raspberries for pink or for purple, use freeze-dried blueberries or a mix of freeze-dried raspberries with blue spirulina.