Instructions:
- Place the Kerrygold Unsalted Butter in the bowl of a stand mixer and beat at medium speed until smooth, creamy, and pale yellow, about 3 minutes.
- Stop the mixer, add about a third of the powdered sugar, and then beat on low until incorporated. Repeat twice with the remaining powdered sugar, stopping the mixer when adding the sugar.
- With the mixer on low, add the heavy cream, vanilla, lemon zest, and salt.
- Mix until everything is incorporated, then increase speed to medium-high and beat until frosting is smooth and fluffy, about 3-4 minutes.
- Add food coloring if using and mix until evenly incorporated
- If not using right away or the frosting gets too soft to spread, chill the frosting in the refrigerator and re-whip before decorating.