Take butter out of the refrigerator 30 minutes before making the frosting.
Place the chopped white chocolate into a small, heat proof bowl. Microwave for increments of 30 seconds. Stir well in between and continue until chocolate is just melted. Allow to cool to room temperature (at least 15 minutes).
In a small saucepan over medium heat, bring water to a boil. Once boiling, remove from heat. Add the 1/2 tablespoon of dried hibiscus. Allow to steep for 15 minutes. After 15 minutes, strain hibiscus. Allow the "hibiscus water" to cool to room temperature.
Add the butter to a large bowl or the bowl of an electric mixer. Beat with a mixer until light and creamy.
With the mixer on low, slowly add the melted, cooled white chocolate.
Gradually add the powdered sugar followed by the freeze dried strawberries (ground in a food processor), vanilla and salt.
With the mixer on low, add the hibiscus water gradually.
Increase speed to medium high and beat for about 1 minute or until frosting is light and fluffy. If frosting is too thin, gradually beat in more sifted powdered sugar. If too thin, add heavy cream a teaspoon at a time.
Frost the cupcakes with an offset spatula or your favorite piping tip. Enjoy!