Penelope Toasted Barrel Cask Strength is a bourbon bottled at a higher proof and finished in toasted barrels. For a new drinker, that usually means a fuller, more intense style with extra oak influence layered onto the whiskey's natural sweetness.
Compared with a standard bourbon, this style often emphasizes richer vanilla, caramel, and toasted wood notes. The cask strength presentation can make it feel bold and concentrated, so many drinkers add a little water to open it up.