Name: Steak Pasta Casserole Recipe
Prep time: 10 min
Cook time: 35 min
Total time: 45 min
Cuisine: American
Ingredients: 1.5 lb steak (fresh or cooked; cut in bite-size pieces); 4 cups white button mushrooms (sliced); 12 asparagus spears (roughly chopped; optional); 2 garlic cloves (peeled and crushed, but in one piece); 5 Tbsp butter (salted or unsalted + a little extra to grease the dish); 3 cups cream (heavy cream or half and half); 2 cups shredded Parmesan cheese; 1.5 cup shredded mozzarella cheese; ½ tsp fine table salt; ½ tsp ground black pepper; 1 beef bouillon cube (crumbled); 1 lb fresh penne pasta (see note for dried pasta)

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If you have been searching for a truly comforting and crowd-pleasing dinner idea, this Steak Pasta Casserole Recipe is about to become your new best friend in the kitchen. Combining tender, flavorful steak with creamy, cheesy pasta and fresh, vibrant mushrooms and asparagus, this dish offers a balance of textures and flavors that’s nothing short of irresistible. It’s simple enough for a weeknight but impressive enough to make for guests, and the leftovers (if there are any) taste just as heavenly the next day.

Ingredients You'll Need

The dish is in a white oval baking dish placed on a white marbled texture surface. It has three visible layers: the bottom layer is a creamy sauce mixed with pieces of mushrooms and green vegetable stems, the middle layer consists of whole green vegetable stems spread throughout, and the top layer is a thick, even covering of shredded white cheese scattered over the entire surface. Photo taken with an iphone --ar 4:5 --v 7

Every ingredient in this Steak Pasta Casserole Recipe plays a vital role, from the richness of the cream to the sharpness of Parmesan and the fresh crunch of asparagus. Trust me, each element contributes beautifully to the final flavor and texture that makes this casserole unforgettable.

Butter (5 Tbsp): Adds richness and helps sauté the garlic and mushrooms to perfection.
Garlic cloves (2): Crushed to release that deeply aromatic flavor that infuses the whole dish.
Steak (1.5 lb): Fresh or leftover, cut into bite-sized pieces for tender, juicy bites throughout.
Salt (½ tsp): Essential for seasoning and bringing out all the flavors.
Ground black pepper (½ tsp): Adds just the right amount of mild heat and depth.
White button mushrooms (4 cups): Sliced thin for earthiness and a lovely meaty texture.
Beef bouillon cube (1): Crumbled to enrich the sauce with concentrated savory notes.
Cream (3 cups): Heavy cream or half and half, providing a lush, velvety base for the casserole.
Fresh penne pasta (1 lb): Holds the creamy sauce perfectly and adds satisfying chew.
Shredded Parmesan cheese (2 cups): Brings a nutty, salty sharpness that melts into the sauce.
Asparagus (12 spears, roughly chopped): Optional but highly recommended for a bright, fresh bite and beautiful color contrast.
Shredded mozzarella cheese (1.5 cups): Creates that irresistible golden, bubbly layer on top of the casserole.

How to Make Steak Pasta Casserole Recipe

Steak Pasta Casserole Recipe - Recipe Image

Step 1: Prep Your Oven and Dish

Start by preheating your oven to 400 °F. Lightly grease your casserole dish with butter, oil, or cooking spray. This simple step ensures the casserole won’t stick and will crisp beautifully on the edges.

Step 2: Sauté Garlic and Butter

Melt the butter over medium-high heat in a pan and toss in the crushed, whole garlic cloves. Sauté just about a minute until the kitchen fills with that incredible fragrant aroma — garlic butter is a game changer right from the start!

Step 3: Brown the Steak

Add your steak pieces to the pan and season them with salt and pepper. Sear for 2-3 minutes until the outsides are beautifully browned, but don’t stress about cooking them all the way through yet. This step locks in flavor and depth.

Step 4: Cook the Mushrooms

Toss in those sliced mushrooms and stir as they soften and release their juices, cooking for just 1-2 minutes here. Mushrooms soak up all that garlicky butter, adding earthiness and moisture.

Step 5: Build the Creamy Sauce

Crumble the beef bouillon cube over the mix and pour in the cream, stirring well to combine. Bring everything just to a simmer—this moment transforms the pan into a rich, flavorful sauce.

Step 6: Combine Pasta, Cheese, and Steak

Turn off the heat and fold the fresh penne pasta and Parmesan cheese into the sauce. If using leftover cooked steak, add it now so it heats gently in the creamy mixture without drying out.

Step 7: Assemble and Bake

Pour the combined mixture into your prepared casserole dish. Top with the chopped asparagus (if using) and finish with shredded mozzarella cheese sprinkled generously on top. Bake in the oven for about 30 minutes or until the casserole is golden brown and set in the middle.

How to Serve Steak Pasta Casserole Recipe

Garnishes

For extra freshness, sprinkle chopped fresh parsley or basil on top just before serving. A light drizzle of high-quality extra virgin olive oil or a few red pepper flakes can also add a nice zing and elevate the flavor beautifully.

Side Dishes

This casserole is quite hearty on its own but pairs wonderfully with a crisp green salad tossed with lemon vinaigrette to cut through the richness. Garlic bread or a crusty baguette is also perfect for mopping up every last bit of that creamy sauce.

Creative Ways to Present

Serve individual casserole portions in small ramekins for a charming touch at dinner parties. You can also add a sprinkle of toasted breadcrumbs or nuts on top before baking to introduce a delightful crunch that contrasts the creamy pasta.

Make Ahead and Storage

Storing Leftovers

Allow the casserole to cool completely before storing it in an airtight container in the refrigerator. It stays fresh and delicious for up to 3 days, making it a fantastic option for quick lunches or easy dinners throughout the week.

Freezing

This Steak Pasta Casserole Recipe freezes well, too! Wrap it tightly with plastic wrap and foil or use a freezer-safe container. Frozen leftovers can last up to 2 months. Just thaw overnight in the fridge before reheating.

Reheating

Reheat leftovers gently in the oven at 350 °F until warmed through to keep the texture creamy without drying out. If you’re pressed for time, reheating in the microwave works, but do it in short increments and stir occasionally to maintain even heat.

FAQs

Can I use dried pasta instead of fresh penne?

Absolutely! If using dried pasta, cook it until just al dente before mixing it into the sauce, as it will cook further during baking. Fresh pasta is wonderful but not mandatory for this dish.

What type of steak is best for this casserole?

Any tender cut works well, like sirloin or ribeye. The key is cutting it into bite-sized pieces and not overcooking it during searing so it stays juicy.

Is the asparagus absolutely necessary?

No, asparagus is optional but highly recommended. It adds a lovely fresh crunch and a bit of color that brightens the whole casserole beautifully.

Can I make this recipe vegetarian?

For a vegetarian twist, swap the steak for hearty vegetables like roasted eggplant or zucchini and use vegetable bouillon cubes. You’ll still get a rich, creamy casserole with lots of flavor.

How can I make this casserole ahead for a dinner party?

Prepare everything up to assembling the casserole the day before. Refrigerate uncovered after assembly and bake right before serving, just add a few extra minutes if baking from cold.

Final Thoughts

This Steak Pasta Casserole Recipe is such a wonderful combination of comfort, flavor, and ease that it quickly becomes a beloved staple. Whether you’re cooking for family or friends, it’s the kind of dish everyone asks for again. Give it a try—you might just discover your new favorite go-to meal!

Ingredients You'll Need