National Coming Out Day Cupcakes

Makes 24 cupcakes 429g allpurpose flour 3 teaspoons baking powder 265g granulated sugar 1, 2 teaspoon salt 375ml of milk 125ml vegetable oil 125g butter 2 tbsp Greek yogurt (can substitute with sour cream) 1 teaspoon vanilla extract 2 large eggs Yellow, Green, Blue, Purple, Red, Orange Food colouring 24 Rainbow sour straps Mini marshmallows OR Marshmallow sprinkles 1 batch of buttercream frosting