01 -
Place the softened butter in a large mixing bowl and beat with an electric mixer on medium speed for about 3 minutes until it becomes light and airy.
02 -
Add the confectioner's sugar, lemon zest, salt, and 3 tablespoons of lemon juice to the whipped butter. Begin mixing on low speed to prevent a sugar cloud, then gradually increase to medium speed. Beat until the mixture is silky smooth and perfectly creamy. Adjust the texture by adding more lemon juice for a thinner consistency or additional powdered sugar to thicken it up.
03 -
Spread the frosting immediately onto completely cooled baked goods, or transfer to an airtight container for later use. When refrigerated, this frosting stays fresh for up to one week - just let it come to room temperature before using. It can also sit at room temperature for 2 to 3 days.