Add 1 cup butter softened into a bowl add in 1 tsp vanilla paste and whip together on low for 1 to 2 minutes. In a small bowl combine 5 cup powdered sugar and 1/2 cup Dutch cocoa powder. Whisk together. Add the sugar and chocolate mixture in to the butter mixture. Very slowly, 1 to 2 cups at a time on a slow speed. Once completely combined you can use on anything. It is so delicious.
Notes
To store, you can store in the refrigerator in an airtight container up to 1 week.
You can freeze buttercream frosting in the freezer in an airtight freezer safe container for up to 3 months. Just bring it to room temperature when you are ready to use.