Which of the following is NOT an appetizer offered at Texas Roadhouse?

The correct choice is Killer ribs, as they are not classified as an appetizer on the Texas Roadhouse menu. Instead, Killer ribs are typically featured as a part of the main entree offerings, which are more substantial dishes meant to serve as the primary focus of a meal.

On the other hand, fried pickles, cactus blossom, and stuffed mushrooms are all recognized as appetizers. They are designed to be smaller portions intended to start a dining experience, making them ideal for sharing or enjoying while waiting for the main course. Each of these items offers a distinct flavor and texture, contributing to the variety typically found in appetizer selections at restaurants.