Cream butter and cream cheese. In a stand mixer fitted with the paddle attachment, cream together 1/2 cup butter and 6-8 ounces cream cheese. Beat until fluffy.
Add lemon and sugar. Add 3-4 cups powdered sugar, 2 Tablespoons lemon juice, zest of one lemon, 1 teaspoon vanilla extract, salt and yellow food coloring (if desired). Mix until creamy. If you need to thin the frosting, add a dash of milk. If you want to thicken it, add a couple Tablespoons powdered sugar.
Frost desired baked goods. Frost cupcakes or cake as desired.
Notes
Butter and cream cheese: Make sure to leave the butter and cream cheese out an hour before making or follow these tips on how to soften butter and how to soften cream cheese. For piping: If using this recipe to pipe frosting onto cupcakes, I like to use only 6 ounces cream cheese and an extra cup of powdered sugar.Store: The frosting is best stored in an airtight container for up to 3 days in the refrigerator. Cakes and cupcakes that are frosted should be refrigerated within 2 hours. Freeze: Freeze in an airtight container for up to 3 months. Let it thaw out in the fridge and then come to room temperature on the counter. Give it an additional whip for a minute or two before spreading it on your cakes.