2 sticks butter, softened
4 cups powdered sugar
1 tablespoon water or milk
1 teaspoon vanilla extract
1 whole vanilla bean
Using an electric mixer (a large stand mixer works best but a handmixer will do just fine), beat butter until creamy. Add the powdered sugar, milk, and vanilla extract. Mix on very slow speed just until the sugar begins to get incorporated.
Using a small sharp knife, split the vanilla bean lengthwise. Scrape out the entire vanilla bean. Put the contents (those thiny little black specs) into the bowl with the frosting mixture.
Beat the frosting until light and fluffy (about 5 to 10 minutes). Add milk a teaspoon at a time if needed to reach a spread-able consistency.
Top your favorite cake or cupcakes. Enjoy!