Overview

• The French Onion lineup went live on the Shack App on Sept. 9 and will be available at U.S. locations starting Sept. 12.
• The seasonal menu features a French Onion Soup Burger, a 'Shroom Burger variant, a Shack Stack, Parmesan Garlic Fries, beer-battered Onion Rings, and the returning Coffee Shake.
• Prices land at the higher end for the chain, with the French Onion Soup Burger listed around $10.99 and the Shack Stack around $14.29, with sides and shakes starting near $5.49.
• Onion rings appear on the menu for the first time after sustained customer requests, capping nearly two years of culinary testing on the French onion concept.
• CEO Rob Lynch frames premium limited-time offerings as "democratized fine dining" and says an 18‑month pipeline is in place, as Q2 revenue rose 12.6% with same-store sales up 1.8% and cost pressures from beef persist.