About

From renown Italian restaurateur Mario Iaccarino and The Ritz-Cartlon, St. Louis comes the first official United States venture, inspired by southern Italian landmark restaurant Don Alfonso 1890. Mario’s brother, chef Ernesto Iaccarino, created the menu which features beloved southern Italian dishes that honor the family’s culinary heritage, while showcasing regional ingredients. The color palette, inspired by lavender fields in Sant’Agata, sets a romantic tone for the restaurant where the light purple motif is featured in the cascading wisteria chandelier, hand painted tile in the open kitchen, and even the servers’ uniforms. As a nod to the most iconic monument in St. Louis, arches and curves can be seen throughout the space, signifying a gateway from old to new. The focal points of Casa Don Alfonso invites diners’ eyes to dance through the interior, leading guests on a curated, visual experience like the twists and turns of the city’s converging rivers. Overall, the intimate, yet approachable, space acts as a canvas for the food it presents, evoking a sense of whimsy and possibility from guests’ first steps inside.

100 Carondolet Plaza
Ritz Carlton St. Louis
Clayton, MO 63105

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TripAdvisor Rating:

19 Reviews | Write a Review
Charming and Luxurious
Reviewed By nadacik August 2026

Beautiful restaurant, fantastic service and good food. Absolutely pleasant experience.

Full Review
Thanksgiving Feast? I don’t think so
Reviewed By Brian K November 2025

We were excited to go to Casa Don Alfonso for Thanksgiving 3 course dinner. I did not eat all day with promises of soup and turkey and sides and desert. For the $95 I left hungry. Such a small...

Full Review
Thanksgiving Bruch Buffet 2025
Reviewed By HJ K November 2025

We eat often at the Ritz in Dana Point, CA so after moving to St Louis were eager to enjoy the Ritz here. (Thanksgiving Brunch at 2:00 PM) The food choices were good and displayed beautifully...

Full Review

Hours

A La Carte Breakfast: Mon. - Fri. 6:30 AM-10:00 AM Signature Breakfast Buffet: Sat. 6:30 AM-10:00 AM, Sun. 6:30 AM-1:00 PM Grab & Go: Mon. - Fri. 6:30 AM-10:00 AM, Sat. & Sun. 6:30 AM-11:00 AM Lunch & Takeaway Mon. - Sat.: 11:00 AM-2:00 PM Bar (Bev. Only) Tue. - Sat. 2:00 PM-5:00 PM Dinner Tue. - Thur. 5:00 PM - 9:00 PM, Fri. & Sat. 5:00 PM-10:00 PM

Midtown/ClaytonClayton

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TripAdvisor Rating:

19 Reviews | Write a Review
Charming and Luxurious
Reviewed By nadacik August 2026

Beautiful restaurant, fantastic service and good food. Absolutely pleasant experience.

Full Review
Thanksgiving Feast? I don’t think so
Reviewed By Brian K November 2025

We were excited to go to Casa Don Alfonso for Thanksgiving 3 course dinner. I did not eat all day with promises of soup and turkey and sides and desert. For the $95 I left hungry. Such a small...

Full Review
Thanksgiving Bruch Buffet 2025
Reviewed By HJ K November 2025

We eat often at the Ritz in Dana Point, CA so after moving to St Louis were eager to enjoy the Ritz here. (Thanksgiving Brunch at 2:00 PM) The food choices were good and displayed beautifully...

Full Review
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