This frosting is AMAZING. It is not the texture of a chocolate buttercream. Fresh made it is sticky and gooey. It will harden up a bit depending on the room temperature (it will definitely set up in the fridge). It is still good after several days in the fridge, and even after going in the freezer and thawing. I did not try to pipe this.
Because I followed exactly Pioneer Woman's recipe and she has lots of excellent step-by-step photos and instructions, I am just linking you to her recipe.