Mediterranean Ruth’s Chris Cheesy Spinach Casserole with Monterey Jack
This cheesy spinach casserole is inspired by the classic Ruth’s Chris Steak House side dish, with a gentle Mediterranean twist that keeps it rich but balanced. Creamy, savory, and deeply comforting, it combines tender spinach with butter, onion, garlic, cream cheese, and a generous blend of Monterey Jack, cheddar, and Parmesan. Baked until set and lightly golden, this casserole delivers that signature steakhouse indulgence while still feeling approachable and homemade. It works beautifully as a holiday side, a dinner party favorite, or an upgrade to a simple weeknight meal when you want something special without extra effort.
Prep Time: 20 minutes
Cook Time: 45 minutes
Total Time: 1 hour 5 minutes
Servings: 6 to 8
Ingredients
Frozen chopped spinach: 2 (10-ounce) packages, thawed and very well drained
Olive Oil: (1/2 cup),
Small onion: 1, finely chopped
Garlic: 3 cloves, minced
Heavy cream: 1 cup
Cream cheese: 4 oz, softened
Shredded Monterey Jack cheese: 1 cup
Shredded cheddar cheese: 1 cup
Grated Parmesan cheese: 1/4 cup, plus more for topping
Large eggs: 2, beaten
Salt: 1/2 teaspoon
Black pepper: 1/4 teaspoon
Garlic powder: 1/4 teaspoon
Onion powder: 1/4 teaspoon
Paprika: 1/4 teaspoon
Instructions
Preheat the oven to 375°F and lightly grease an 8×8 inch or similar baking dish.
Thaw the spinach completely and squeeze out as much moisture as possible using a clean kitchen towel or cheesecloth. Set aside.
In a skillet over medium heat, add a small amount of olive oil and sauté the chopped onion for 3 to 4 minutes until soft.
Add the minced garlic and cook for 30 seconds until fragrant, then remove from heat.
In a large mixing bowl, combine the remaining olive oil, heavy cream, and softened cream cheese. Stir until mostly smooth.
Add the beaten eggs, salt, black pepper, garlic powder, onion powder, and paprika. Mix until well combined.
Stir in the sautéed onion and garlic, followed by the drained spinach. Mix until evenly distributed.
Fold in Monterey Jack, cheddar, and Parmesan cheese, reserving a small amount of Parmesan for the topping.
Transfer the mixture to the prepared baking dish and spread evenly. Sprinkle the reserved Parmesan on top.
Bake uncovered for 40 to 45 minutes until set in the center and lightly golden on top. Let rest for 10 minutes before serving.
Tips
Drain the spinach extremely well to prevent a watery casserole.
Use full-fat dairy for the best texture and flavor.
Let cream cheese soften fully for easier mixing.
Sautéing the onion first adds depth and sweetness.
Do not overbake, as the eggs will firm up more while resting.
Resting time helps the casserole slice cleanly.
Freshly shredded cheese melts more smoothly than pre-shredded.
Taste the mixture before baking and adjust seasoning if needed.
Use a glass or ceramic baking dish for even heat.
Lightly tent with foil if the top browns too quickly.
Variations
Add a pinch of nutmeg for warmth and depth.
Swap Monterey Jack for mozzarella for a milder profile.
Add chopped sun-dried tomatoes for Mediterranean flair.
Mix in sautéed mushrooms for extra umami.
Use smoked paprika for subtle smokiness.
Add crushed red pepper flakes for gentle heat.
Substitute half the spinach with kale, finely chopped.
Use Gruyère instead of cheddar for a nuttier flavor.
Add a light breadcrumb topping for texture.
Finish with a drizzle of olive oil before serving.
Q&A
Can I make this ahead of time?
Yes, assemble up to 24 hours ahead and bake before serving.
Can I freeze this casserole?
Yes, freeze baked and cooled portions for up to two months.
Can I use fresh spinach?
Yes, cook it down first and drain thoroughly.
Is this gluten free?
Yes, all ingredients are naturally gluten free.
Why are eggs used?
They help the casserole set and slice cleanly.
Can I reduce the butter?
You can, but the texture will be less rich.
What main dishes pair well with this?
Steak, roasted chicken, lamb, or grilled fish.
Can I double the recipe?
Yes, use a 9×13 inch dish and extend baking time slightly.
How do I reheat leftovers?
Reheat covered in a 350°F oven until warmed through.
Can I make it vegetarian friendly?
It already is, as written.
Nutrition
(Approximate Per Serving)
Calories: 390
Protein: 13g
Fat: 32g
Carbohydrates: 9g
Fiber: 3g
Sodium: 520mg
Conclusion
This Mediterranean Ruth’s Chris inspired cheesy spinach casserole delivers everything you want from a steakhouse side dish. It is creamy, rich, and deeply flavorful, yet simple enough to prepare at home with everyday ingredients. The combination of Monterey Jack, cheddar, and Parmesan creates a perfectly balanced cheese profile, while spinach keeps it hearty and satisfying. Whether served for holidays, special dinners, or comforting family meals, this casserole is a reliable crowd-pleaser that feels indulgent without being complicated.