Grandma Ruth swears this is the easiest party sandwich to pass around while the big game’s on.

Pack into takeout boxes: For easy passing around during the game, nestle 3–4 filled romaine sandwiches into each takeout-style box or reusable meal prep container, arranging them snugly so they don’t tip over. Close the lids and line the boxes up on your kitchen counter or a tray so guests can grab a box and go.
Chill briefly or serve: If you have the time, chill the packed boxes in the fridge for about 15–20 minutes before serving so everything is extra crisp and the flavors meld a bit. Otherwise, serve right away while the romaine is cold and crunchy. Keep any extra boxes in the fridge and swap them out as the first ones disappear.
Variations & Tips
To dial down the heat for kids or spice-sensitive guests, use a mild buffalo sauce and add more Greek yogurt or sour cream to mellow it out. If you want a stronger blue cheese punch, double the blue cheese in the mix and on top, or drizzle with a little bottled blue cheese dressing. For a ranch twist, swap the blue cheese for shredded cheddar and use ranch dressing or ranch seasoning instead of some of the spices. You can also use leftover grilled chicken or slow-cooker chicken instead of rotisserie to make this even more budget-friendly. If you’re prepping ahead for a party, mix the buffalo chicken filling up to 2 days in advance and store it in the fridge, then assemble into romaine leaves and pack into takeout boxes right before guests arrive so the lettuce stays crisp. For a slightly heartier version while staying low carb, add finely chopped bell peppers or shredded cabbage to the chicken mixture for extra crunch and volume without needing bread.