Kelly’s Roast Beef Secret Menu Guide 2026
Here is the short answer: Kelly’s Roast Beef has no official secret menu, but regulars have been ordering off-menu hacks for years. The big ones are the onion three way remix, roast beef loaded fries, a DIY surf and turf, custom frappe combos and the slider flight. They are all customizations of regular items, so any location can make them.
I looked into this because, honestly, Kelly’s is one of those Massachusetts institutions where the locals all seem to know something you don’t. The full Kelly’s Roast Beef menu with prices covers the classics: roast beef, the three ways, sliders, loaded fries and frappes. But the Kelly’s Roast Beef secret menu lives between those items, in the combinations the crew will happily build if you just ask the right way.
So here’s the thing. Kelly’s isn’t a franchise with a rigid assembly line, it’s a small New England chain that started as a hot dog stand in Saugus back in 1951, and the kitchens still cook like a classic beef-and-seafood shack. Everything is made to order, so mixing and matching is no big deal, and that’s exactly why the Kelly’s roast beef hidden menu works.
How the Kelly’s Roast Beef Secret Menu Works
There is no hidden code word. Every item here is built from things the kitchen already has, which is why the ordering scripts below are plain language instead of secret names. The trick is knowing what to ask for.
A few ground rules: order during a slower stretch if you can, expect a small upcharge for extras like cheese or extra beef, and remember locations are individually operated, so smile and explain what you want. You’ll almost always get it.
What Is the Kelly’s Onion Three Way Remix?
Let’s start with the most famous of the Kelly’s off menu items. The board already sells two official three ways: the Original Three Way (roast beef, James River BBQ sauce, American cheese, mayo) and the Onion Three Way (roast beef, grilled onions, mayo, onion rings on an onion roll). The remix? Both, combined, and yes, it answers what the Kelly’s onion three way ingredients taste like with the full three way treatment.
How to order: “Can I get the onion three way with American cheese and James River BBQ sauce?” It runs a little over the small onion three way’s ~$12.65, plus a buck or two for add-ons.
Can You Get Roast Beef Loaded Fries at Kelly’s?
Yes, and it’s the one I’d tell a first-timer to order. Kelly’s loaded fries already come in cheese, bacon cheese, chili cheese and steak and cheese versions. Ask them to pile the signature roast beef on top instead.
How to order: “Can I get a large cheese fries with roast beef on top?” The thin-sliced beef melts into the cheese. Expect around $11.00 to $13.75 plus a few dollars for the roast beef add-on. It’s the closest thing to a Kelly’s roast beef secret menu signature item that exists.
The DIY Surf and Turf Hack
Here’s one that’s really just smart ordering. Kelly’s is one of the rare roast beef joints that also does genuinely good fried seafood. Order a couple of roast beef sliders ($4.95 each) alongside any seafood plate and you’ve got surf and turf for way less than a sit-down restaurant.
The real move: pair the roast beef slider with the popcorn shrimp slider ($6.05) and ask for James River BBQ to dip them in. Two sliders, two worlds, under $12.
What About Kelly’s Secret Frappe Combos?
Okay, this is where it gets fun. Kelly’s frappes are made with Richardson’s ice cream, and the lineup already includes some wild ones (the Bananarama and pumpkin spice frappes, around $7.15 to $8.25). The regulars just ask for custom blends, and the machines will mix basically anything.
How to order: ask for a half-and-half blend, vanilla and coffee is the classic, chocolate and banana tastes like a candy bar. There’s no extra charge for the blend. One more dessert trick: get the store-baked chocolate chip cookie ($2.48) crumbled into a vanilla frappe. They’ll look at you funny. They’ll do it anyway.
The Slider Flight: All Four at Once
Kelly’s sliders are the perfect size for a tasting round, and ordering all four is the easiest secret menu move in this guide. The lineup: roast beef ($4.95), pulled BBQ beef ($4.95), fried chicken ($4.95) and popcorn shrimp ($6.05). Total is around $20.95, which feeds one hungry person or works as a shareable. The pulled BBQ beef slider is a sleeper hit most people walk right past.
| Hack | How to order it | Rough price |
|---|---|---|
| Onion three way remix | Onion three way plus American cheese and James River BBQ sauce | ~$14-15 |
| Roast beef loaded fries | Large cheese fries topped with sliced roast beef | ~$14-17 |
| DIY surf and turf | Roast beef slider plus popcorn shrimp slider | ~$11 |
| Secret frappe blend | Half-and-half ice cream flavors, e.g. vanilla and coffee | ~$8.25 |
| Cookie frappe | Vanilla frappe with a crumbled chocolate chip cookie | ~$10.75 |
| Slider flight | One of each of the four sliders | ~$20.95 |
Quick note: the Kelly’s Roast Beef secret menu prices above are ballpark figures built from current menu pricing, but every location sets its own prices, so your total might be a dollar or two off.
❓ Frequently Asked Questions
Is there an official Kelly’s Roast Beef secret menu?
No. What fans call the secret menu is really a set of customer-discovered customizations, like the onion three way remix and roast beef loaded fries, built from regular menu items the kitchen already stocks.
What is the Kelly’s onion three way made of?
Kelly’s roast beef on an onion roll with grilled onions, mayonnaise and onion rings on top, around $12.65 for the small. The “remix” adds American cheese and James River BBQ sauce for a small upcharge.
How much do Kelly’s Roast Beef secret menu items cost?
Most hacks cost between $8 and $21. The cheapest is a blended frappe at around $8.25, while the full slider flight runs about $20.95. Customizations usually add $1 to $3 on top of the base menu item price.
Can I order these hacks at every Kelly’s location?
Usually yes, since everything is made from regular ingredients. Locations are individually operated though, so add-on pricing can vary. Ordering in plain language and asking nicely goes a long way.
Bottom line: the Kelly’s Roast Beef secret menu isn’t a list you unlock, it’s a way of ordering. Start with the onion three way remix, graduate to roast beef loaded fries, finish with a custom frappe. Now you’re in on it.
Prices last verified: October 16, 2026. Source of truth: the brand’s official menu page.
