Casa Tequila Cantina & Grill: Mexican Favorites in St. Charles County
Revised July 23, 2026
Where is Casa Tequila Cantina & Grill and what does it serve?
Casa Tequila Cantina & Grill is a family-run Mexican restaurant with two St. Charles County locations: the Winghaven area of O’Fallon (905 Caledonia Dr) and the original in Warrenton (1000 Warrenton Outlet Ctr, Ste 14). It serves street tacos, sizzling fajitas, carne asada, chunky guacamole, its signature Trash Can Nachos, and a deep list of margaritas and tequilas. It also runs a food truck for private events.
Keep reading ↓Imagine a Friday night in St. Charles County. Someone in the group wants tacos, someone else wants a margarita the size of their face, and nobody wants to drive downtown for either. Out in the Winghaven area of O’Fallon — or over in Warrenton, if that’s your side of the county — there’s a family-run spot that has quietly become the answer to exactly that Friday: Casa Tequila Cantina & Grill. It’s the sort of place that solves the “what do you want to eat” standoff before it even gets going.
Maybe you’ve passed it on a grocery run and never stopped. Maybe a coworker in Lake Saint Louis keeps raving about the nachos. Either way, once you’ve gone you tend to become one of the people doing the raving. Casa Tequila has built the kind of loyal following — hundreds of four-and-five-star reviews across two locations, holding right around a 4.5-star average — that only comes from feeding people well, again and again. Here’s an honest look at what it is, what to order, and where to find it.
Two locations, one family
First, a point the internet often muddles: Casa Tequila Cantina & Grill is one restaurant with two locations, both in St. Charles County’s western reaches. The original is in Warrenton, inside the Warrenton outlet center; the second, in the Winghaven development in O’Fallon, opened a couple of years later. “Winghaven” isn’t a separate place — it’s just the name of the O’Fallon store’s neighborhood.
Both are run by the same husband-and-wife team, Leo and Jessenia Lopez, and that family ownership shows. This is a from-scratch, hands-on operation, not a franchise following a corporate playbook — the kind of independent local restaurant that a chain-heavy stretch of suburbia is lucky to have. When the same family has its name over two doors, the recipes and the standards travel between them, which is why regulars trust either location to deliver the same plate.
What to order
The menu is classic Mexican done with care, and a few things earn their reputation:
Street tacos — carne asada, al pastor, barbacoa, shrimp — the everyday workhorse and a great first order.
Sizzling fajitas — steak or chicken, arriving loud and fragrant, built for sharing.
The Trash Can Nachos — a signature, and exactly as over-the-top and shareable as the name promises.
Carne asada and chunky guacamole — the fundamentals, done right, which is the real test of any Mexican kitchen.
The margaritas — genuinely a draw here, backed by a deep tequila selection numbering in the hundreds. Regulars call them out by name.
Portions run generous, which is part of the value equation — you tend to leave full and carrying a box. Menus evolve, so if you have a specific craving, glance at the current menu online or just ask — the staff are happy to point you to what’s good tonight. Reviewers across Google and the delivery apps routinely rank it among the better Mexican food in the area, and the consistency — the same quality on a random Tuesday as on a packed Saturday — is exactly what turns a first-time visitor into a monthly regular.
If you’re eating at home, both locations are set up for takeout, and the food travels well — tacos and fajitas hold up on the drive across O’Fallon or Warrenton better than most. It makes a solid weeknight option when nobody wants to cook but everyone’s tired of the usual pizza rotation, and it delivers through the major apps for the nights when even leaving the house feels like too much.
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The tequila and margarita program
The name isn’t an accident. Casa Tequila leans into its bar with a tequila selection that runs into the hundreds — the kind of range that lets you drink your way from a familiar blanco to a smoky, sipping-quality añejo. If tequila has only ever meant the burn of a bad college shot, this is a good place to be gently corrected.
The margaritas are the headliner for most tables, and regulars are loyal to them — classic on the rocks, blended with fruit, or built up into something more ambitious. Pair one with the Trash Can Nachos to start and you’ve got the platonic ideal of a St. Charles County Friday night. For anyone not drinking, the usual Mexican-restaurant standbys and soft options are on hand too, so the designated driver isn’t stuck with water. It’s the kind of bar program that makes the place work equally well for a casual weeknight and a birthday worth celebrating — you can keep it simple or make a night of it, and the room flexes to match.
The vibe: upscale-casual with a patio streak
Casa Tequila leans into a warm, upscale-casual feel — comfortable enough for a family dinner, lively enough for a night out with friends. The Winghaven location in particular plays up the social, patio-and-sports side of things, with outdoor space and an easygoing atmosphere that suits a summer evening and a pitcher of margaritas. It’s the kind of place where a quick weeknight dinner and a leisurely celebration both feel right at home.
Service gets consistent praise, which matters as much as the food for a neighborhood restaurant. When people describe why they keep returning, it’s usually some combination of the flavors, the generous plates, the drinks, and staff who make you feel like a regular even on a first visit — a rare combination that’s harder to find than it should be. That’s the quiet advantage of a family-run place: the owners are often on the floor, and it shows in how the room is run.
Why a family-owned spot is worth choosing
It’s easy to default to a national chain when you’re hungry and don’t want to think. But there’s a real case for a place like Casa Tequila instead. When Leo and Jessenia Lopez own the restaurant, the quality is personal — their name is on it, their neighbors are the customers, and a bad night isn’t a data point on a corporate dashboard, it’s a face they’ll see at the grocery store. That accountability is exactly why independent restaurants so often out-cook their chain competition on flavor and care.
It’s also where your money goes further for the community. Dollars spent at a locally owned restaurant circulate back through the local economy far more than dollars spent at a chain, and the character it adds to a place like Winghaven or Warrenton — a real gathering spot, not an interchangeable box — is the kind of thing a suburb misses only after it’s gone. Choosing the family-run taco spot over the drive-thru is a small vote for the kind of town you want to live in.
A first-timer’s game plan
Never been? Keep it simple. Start with chips and the chunky guacamole while you look at the menu, and put in an order of the Trash Can Nachos if you’re with a group — it’s built to share and it’s the signature for a reason. For the main event, the street tacos are the easiest crowd-pleaser (get a mix — carne asada, al pastor, barbacoa), while the sizzling fajitas make the whole table turn to look when they arrive. Add a margarita, pace yourself, and you’ve had the full Casa Tequila experience on the first try. Bring the family or a crew — the portions are generous and the room is built for a good time, not a hushed one. And if the weather’s good, ask about patio seating at the Winghaven location; a margarita outdoors on a warm St. Charles County evening is hard to beat, and it’s exactly the sort of small, local pleasure that’s easy to overlook until you make a habit of it.
Two neighborhoods, one reliable answer
The two locations quietly cover a lot of St. Charles County ground. The O’Fallon store sits in Winghaven, a master-planned community of homes, offices, and green space in one of the fastest-growing parts of the metro — the kind of neighborhood with plenty of families looking for a go-to dinner spot that isn’t a chain. It draws easily from O’Fallon, Lake Saint Louis, Dardenne Prairie, and Wentzville.
The Warrenton location, the original, anchors the western edge of the metro along the I-70 corridor, where good sit-down Mexican is genuinely harder to come by. For folks out that way — Warrenton, Wright City, and the surrounding towns — having a from-scratch, family-run cantina nearby is no small thing. Between the two, Casa Tequila has become the reliable answer to “where should we get Mexican tonight” across a wide stretch of the county’s western half.
Bring the flavors to your event: the food truck
Casa Tequila also runs a food truck for private events — a fun way to bring the tacos, fajitas, and margarita energy to a birthday, office party, graduation, or backyard get-together without anyone having to cook or clean up. There’s something about a taco truck pulling up to your own driveway that turns an ordinary afternoon into an occasion; guests remember it in a way they don’t remember a tray of grocery-store sandwiches. Rates and availability vary by date and event size, so the move is to email casatequilawinghaven@gmail.com with your date, time, location, and rough head count, and let them put together a menu that fits. It’s a simple way to make a gathering feel like a party without you doing the work.
Before you go: locations, hours, and the details
Two spots to choose from, depending on your corner of the county:
O’Fallon / Winghaven: 905 Caledonia Dr, O’Fallon, MO 63368 — (636) 284-7385.
Warrenton: 1000 Warrenton Outlet Ctr, Ste 14, Warrenton, MO 63383 — (636) 377-1269.
Both locations generally run Sunday through Thursday 11 a.m. to 9 p.m., and Friday and Saturday 11 a.m. to 10 p.m. As with any restaurant, hours can shift around holidays and private events, so a quick call ahead never hurts before you make the drive. Between the two locations you’ve got the western side of St. Charles County covered — and if you’re making a night of it near O’Fallon, historic St. Charles Main Street is an easy add for a post-dinner stroll.
Frequently Asked Questions
Where is Casa Tequila Cantina & Grill located?
It has two locations in western St. Charles County: one in the Winghaven area of O’Fallon at 905 Caledonia Dr ((636) 284-7385), and the original in Warrenton at 1000 Warrenton Outlet Ctr, Ste 14 ((636) 377-1269). “Winghaven” refers to the O’Fallon location’s neighborhood, not a separate restaurant.
What kind of food does Casa Tequila serve?
Classic Mexican — street tacos (carne asada, al pastor, barbacoa, shrimp), sizzling fajitas, carne asada, chunky guacamole, and its signature Trash Can Nachos, alongside a deep list of margaritas and hundreds of tequilas. It’s a from-scratch, family-run kitchen, not a chain.
Can I book Casa Tequila’s food truck for an event?
Yes. Casa Tequila runs a food truck for private events like birthdays, office parties, and gatherings. Email casatequilawinghaven@gmail.com with your date, time, location, and approximate guest count, and they’ll work out a menu and pricing for your event.
What are Casa Tequila’s hours?
Both locations generally open Sunday through Thursday from 11 a.m. to 9 p.m., and Friday and Saturday from 11 a.m. to 10 p.m. Hours can vary around holidays, so it’s worth a quick call to confirm before you head over.
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