Box mix won. Though I don’t think it mattered. I substituted some sparkling wine for the water in the mix and the cake became light as air. As if every bite was a sip of champagne. And the frosting tasted like raspberry frozen yogurt. Bring these to any event and you’ll get an automatic invite for next time.
With an electric mixer on low, beat the butter until it starts to get fluffier. Then start adding the powdered sugar one cup at a time. Taste it every time. That way you can make it as sweet as you want and probably won’t use as much sugar. Mix on low until well blended, and then on medium for another two minutes. Add vanilla and champagne, beating on medium for another minute. Add a couple of spoonfuls (to taste) of raspberry preserves.
You can buy the cupcake liners from Bake it Pretty