In a stand mixer fitted with the paddle attachment, cream the butter on medium speed (about one minute).
With the mixer on low speed, gradually add the powdered sugar. Stop to scrape the bowl as needed.
Add the strawberry preserves and strawberry emulsion and mix until combined.
With the mixer still on medium speed, add the whipping cream, then increase the speed to high and whip for about 3 to 5 minutes, until light and fluffy.
Notes
To create the buttercream ruffle design you will need to double the recipe.