What ingredient is not included in the brisket burger?

The brisket burger is a unique offering that typically features brisket as its star ingredient, along with common toppings and accompaniments that enhance its flavor. Brisket serves as the primary protein component, giving the burger its distinct taste.

Pickles, grilled onions, and various other toppings are often used in burgers to add texture and flavor contrast, complementing the richness of the meat. Guacamole, while popular in many burger variations and known for its creamy, rich profile, is not a standard ingredient in the brisket burger. Thus, it stands out as the ingredient that does not belong, making it the correct answer in identifying what is not included in this particular burger option.