In a medium bowl, whip the cream until stiff peaks form. Remove from bowl and set aside.
In the same bowl, whip butter, vanilla extract, lemon zest and powdered sugar for about a minute. You just want to break the butter up in the powdered sugar.
Add milk gradually while mixing on low speed until the frosting comes together, about 2 minutes. Scrape the sides of the bowl as needed.
Incorporate whipped cream gently fold for a light and fluffy texture. Avoid over-mixing to prevent air bubbles.
Use as desired on your cakes, cupcakes, tarts or cookies!