Vegetarian
$15.00Made with a wholesome whole wheat tortilla stuffed with bell peppers, spinach, mushrooms, tomatoes, mozzarella, and jack cheese. Served with chips, sour cream, guacamole, and fresh salsa.
Made with a wholesome whole wheat tortilla stuffed with bell peppers, spinach, mushrooms, tomatoes, mozzarella, and jack cheese. Served with chips, sour cream, guacamole, and fresh salsa.
Tender grilled chicken breast, aromatic basil, bell peppers, mozzarella, and jack cheese folded inside a nutritious whole wheat tortilla.
Juicy grilled chicken breast, fresh basil, bell peppers, mozzarella, jack cheese, and wholesome eggs combined in a warm tortilla.
Flavourful Mexican chorizo, bell peppers, mushrooms, mozzarella, and melted jack cheese packed into a toasted tortilla.
Tender grilled flank steak, crisp lettuce, bell peppers, and a rich blend of jack and mozzarella cheeses.
Premium Angus ground chuck patty topped with fresh lettuce, ripe tomato, and our signature homemade dressing on a toasted brioche bun.
Angus burger featuring grilled bell peppers, fiery jalapeños, and our house-made zesty cilantro pesto.
Premium Angus beef burger topped generously with crispy smoked bacon and melted cheese.
Lean and savory turkey patty served with crisp lettuce and juicy tomato on a toasted brioche bun.
Decadent burger layered with creamy avocado, crispy bacon, and melted jack and cheddar cheeses on a brioche bun.
Plant-based Impossible patty served with fresh lettuce, tomato, and vegan spread on a toasted brioche bun.
Classic comfort grilled cheese sandwich melted to golden perfection, served with French fries or a house salad.
Choice of savory ham, bacon, or turkey paired with melted cheese on toasted bread.
Fresh avocado slices, melted jack cheese, and ripe tomatoes served on grilled sourdough bread.
Traditional hearty sandwich packed with crispy bacon, fresh lettuce, and juicy tomatoes.
Tender sliced turkey breast and creamy fresh avocado layered on toasted bread.
Savory tuna salad topped with bubbly melted mozzarella cheese on grilled sourdough.
Tender corned beef, jack cheese, tangy sauerkraut, and homemade dressing served on grilled sourdough.
Grilled chicken breast topped with house-made cilantro pesto and fresh guacamole on a brioche bun.
Grilled chicken breast, roasted bell peppers, lettuce, tomato, mozzarella cheese, and spicy sriracha mayo on a French roll.
Double-decker classic layered with turkey, bacon, lettuce, and tomato on sourdough.
Double-decker club featuring turkey, bacon, lettuce, tomato, and fresh avocado slices on sourdough.
Delicate bay shrimp and fresh crab meat smothered in melted jack cheese on a flaky croissant or grilled sourdough.
Thinly sliced beef with melted cheese, sautéed onions, and grilled bell peppers served on a fresh French roll.
Eight crispy fried chicken wings served piping hot with your choice of dipping sauce.
Three pieces of golden-battered cod served alongside thick-cut French fries.
Crispy, tender chicken breast nuggets served hot with golden French fries.
Breaded mozzarella sticks fried to perfection, served with warm marinara dipping sauce.
Classic golden crispy French fries lightly salted.
Crispy battered onion rings served with a side of creamy ranch sauce.
Refreshing blend of nutrient-rich spinach, wild berries, and fresh banana.
Fresh strawberries and banana blended into a smooth and sweet treat.
Sweet tropical mango and banana blended to perfection.
Rich vanilla bean ice cream topped with a hot shot of bold espresso.
A nostalgic scoop of vanilla ice cream floating in root beer or your favorite soft drink.
Thick, creamy diner milkshake available in chocolate, vanilla, or strawberry.
Simple, kid-friendly grilled cheese sandwich served with a choice of French fries or coleslaw.
Crispy chicken nuggets served with a side of French fries or coleslaw.
Al dente penne pasta tossed with fresh basil, garlic, and our signature marinara sauce.
Mushroom-filled ravioli with roasted garlic and basil in a decadent white wine cream sauce.
Delicate crab-filled ravioli served with roasted garlic and basil in a creamy white wine sauce.
Cheese or meat stuffed ravioli prepared with roasted garlic, basil, and a rich white wine cream sauce.
Pasta tossed with savory Italian sausage, mushrooms, and sun-dried tomatoes in a rich red wine reduction sauce.
Homemade French Country beef stew with garlic and herbs in a hearty cabernet broth, served with steamed vegetables and rice.
Eight-ounce center-cut choice New York steak served with fluffy rice and steamed vegetables.
Juicy pork chop served with applesauce, steamed vegetables, and rice.
Chicken breast sautéed with mushrooms, tomatoes, garlic, and fresh herbs in a red wine sauce, served with veggies and rice.
Warm homemade apple pie with a flaky crust and sweet spiced apple filling.
Warm homemade apple pie served with a creamy scoop of vanilla ice cream.
Rich layered chocolate cake with decadent chocolate frosting.
Rich layer chocolate cake served with a scoop of vanilla ice cream.
Classic, creamy New York-style cheesecake on a buttery graham cracker crust.
Classic New York-style cheesecake served with a scoop of creamy vanilla ice cream.
Two eggs cooked any style, served with toast and your choice of hash browns or roasted tomato.
Your choice of breakfast ham, bacon, or sausage served with fresh eggs and toasted bread.
Juicy chicken apple sausage or hot link served with eggs, toast, and a side dish.
Spicy Mexican chorizo and bell pepper scramble served with fresh eggs and toast.
Savory homemade corned beef hash cooked to perfection, served with eggs and toast.
Crispy country-fried steak smothered in rich white sausage gravy, served with eggs and toast.
Two pieces of oven-baked thick-cut bacon glazed with brown sugar, cayenne pepper, cracked black pepper, and red pepper flakes.
Thinly sliced Philly beef, mushrooms, onions, bell peppers, jack cheese, and eggs scrambled together into a hearty skillet.
Fluffy omelet stuffed with fresh tomatoes, jack cheese, cilantro, and hemp seeds.
Omelet loaded with your choice of ham, sausage, or bacon, paired with fresh mushrooms and melted cheese.
Classic Denver-style omelet packed with diced ham, bell peppers, onions, and melted cheese.
Fresh spinach and crumbly feta cheese folded inside fluffy, perfectly cooked eggs.
Hearty meat lover's omelet loaded with ham, bacon, sausage, and melted cheese.
Delicate smoked salmon omelet with mushrooms, onions, jack, and cheddar, topped with sour cream.
Garden-fresh vegetable omelet featuring zucchini, mushrooms, tomatoes, onions, bell peppers, and a touch of parmesan.
Savory omelet stuffed with tender chicken breast, mushrooms, onions, and a rich blend of jack and cheddar cheeses.
Spicy Santa Fe style omelet loaded with Mexican chorizo, jack cheese, and bell peppers.
Open-face skillet frittata packed with zucchini, broccoli, mushrooms, bell peppers, onions, tomatoes, fresh herbs, jack, and parmesan.
Rustic skillet vegetable frittata elevated with spicy Mexican chorizo.
Open-face skillet frittata featuring smoked salmon, fresh herbs, and melted cheeses.
Classic crisp Belgian waffle dusted with powdered sugar and topped with whipped cream.
Belgian waffle piled high with fresh sliced strawberries and whipped cream.
Golden crisp Belgian waffle served alongside two eggs cooked any style.
Thick slices of bread dipped in rich batter, grilled golden, and dusted with powdered sugar.
Decadent French toast prepared using flaky, buttery croissants dipped in batter and grilled.
Single fluffy buttermilk pancake served with butter and syrup.
Short stack of two fluffy, golden buttermilk pancakes.
Full stack of three fluffy, golden buttermilk pancakes.
Two apple-infused pancakes served with a side of warm homemade applesauce.
Three apple pancakes served with a side of homemade applesauce.
Two fluffy pancakes loaded with plump blueberries, served with organic warm blueberry sauce.
Three fluffy pancakes studded with blueberries, served with organic homemade blueberry sauce.
Full stack of fluffy pancakes packed with crunchy pecans and fresh sliced bananas.
Classic combination of 2 eggs, 2 strips of bacon, 2 sausage links, and 2 buttermilk pancakes.
Hearty breakfast feast featuring 2 eggs, 2 bacon strips, 2 sausage links, and buttermilk pancakes.
Nestled in the heart of San Francisco’s Union Square neighborhood at 320 Mason St, Mason Diner (Cafe Mason) stands as a beloved round-the-clock culinary sanctuary. Housed within the HI San Francisco Downtown Hostel, this colorful and retro diner captures the timeless essence of classic American comfort food while blending in diverse culinary influences ranging from hearty Mexican breakfasts to comforting Italian pastas.
Stepping into Mason Diner immediately transports guests to a vibrant era of classic diner culture. Reviewers frequently praise the energetic, friendly service—with special shoutouts to staff members like Alejandro for their attentiveness and warmth. Despite its bustling downtown location, diners often note a pleasantly brisk turnaround with minimal wait times, making it an ideal morning refuge for travelers and locals alike.
Breakfast is undeniably the crown jewel at Mason Diner. Patrons rave about the rich, flavorful offerings, such as the exquisite poached eggs with shrimp and crab meat, and the homemade corned beef hash that proudly steers clear of canned shortcuts. For meat lovers, the Billion Dollar Bacon—thick-cut, oven-baked bacon glazed with brown sugar, cayenne pepper, and cracked pepper—is an absolute must-try sensation. Other crowd favorites include the fluffy frittatas, hearty skillet scrambles like the Philly Steak scramble, and an extensive griddle selection featuring Belgian waffles and organic blueberry pancakes.
Beyond breakfast, Mason Diner delivers an eclectic all-day menu featuring gourmet Angus burgers, specialty quesadillas, loaded deli sandwiches, and comforting pasta dishes like mushroom and crab ravioli. While portion sizes are generous and shareable—as many family diners note—the overall quality, freshly squeezed orange juice, and welcoming hospitality deliver a deeply satisfying urban dining experience.
55 Cyril Magnin St, San Francisco, CA 94102
165 O'Farrell St, San Francisco, CA 94102
63 Ellis St, San Francisco, CA 94102
314 Sutter St, San Francisco, CA 94108
721 Market St, San Francisco, CA 94103
52 Belden Pl, San Francisco, CA 94104
Mason Diner opens bright and early every day at 6:00 AM, making it a perfect spot for early risers and travelers in the Union Square area.
Guests frequently rave about the homemade corned beef hash, the Billion Dollar Bacon (thick-cut candied bacon with brown sugar and spices), and the eggs benedict paired with fresh shrimp and crab meat.
Yes! The menu features several vegetarian options, including the Vegetarian Quesadilla, Spinach & Feta Omelet, Vegetable Frittata, and the plant-based Impossible Burger.
Yes, the menu includes gluten-free selections such as the Billion Dollar Bacon and several fresh fruit smoothies and frittatas.
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