Mac And Cheese Recipe For 100: Crowd-Pleasing Creamy Feast

Feeding a crowd doesn’t mean sacrificing quality. This scaled-up version delivers the same creamy comfort as your favorite small-batch recipe.

I developed this method after catering my first large gathering, learning that proper cheese sauce stability is critical when multiplying quantities. The key is gradual incorporation and constant stirring.

The result is a velvety sauce that coats every noodle perfectly, with no graininess or separation. Each serving maintains that homemade richness that makes mac and cheese irresistible.

Perfect for potlucks, fundraisers, or family reunions where you need to serve many without compromising on taste or texture.

Ingredients for Mac and Cheese Recipe for 100

Feeding a hundred starts with quality ingredients scaled for the crowd. Rich, creamy, and utterly satisfying.

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The cheese is everything here. Sharp cheddar from Costco or Sam’s Club gives you the bulk without breaking the bank—get blocks and shred yourself (pre-shredded has anti-caking agents that mess with melt). Gruyere and Parmesan add depth—look for wedges at warehouse stores or ask your deli to cut fresh. For the milk and cream, gallon containers from your regular supermarket work fine, just warm them gently before adding.

No Gruyere? Fontina melts beautifully and is often cheaper. Need a shortcut? Pre-shredded cheese at half the quantity works in a pinch (texture won’t be as smooth). Swap fresh garlic for powder at 1 clove = 1/4 tsp. Whole milk only—no skim or 2%, they won’t give you that velvety finish. The roux needs time to cook out the raw flour taste, so don’t rush this step.

Make the sauce first—it holds beautifully for 2 hours in a warm oven (stir every 20 minutes). Cook the pasta last, drain, and combine right before serving. Leftovers? Portion into gallon ziplock bags, press flat, and freeze for up to 3 months. Reheat in a pot with a splash of milk.

Step-by-Step Instructions for Mac and Cheese for 100

Here’s the method I use for feeding a crowd with silky, ultra-creamy results every time.

Step 1: Cook the Elbow Macaroni to Al Dente

Bring a very large stockpot of heavily salted water to a rolling boil. I use about 1 cup Kosher Salt for the pasta water to ensure the 25 lb Elbow Macaroni is well-seasoned from the start. Add the pasta and cook according to package directions, but start checking for doneness 2 minutes before the suggested time.

You want the macaroni al dente—firm to the bite with a slight resistance in the center. Overcooked pasta will turn mushy when baked with the sauce. Drain immediately in a colander, but don’t rinse. The starch on the pasta helps the cheese sauce cling beautifully.

While the pasta cooks, lightly grease several large baking pans or hotel pans to hold the finished dish. This prevents sticking when it comes time to bake.

Step 2: Create a Smooth, Rich Roux Base

In a large commercial kettle or divided into batches in heavy-bottomed pots, melt all 5 lb Unsalted Butter over medium heat. Once melted, sprinkle in all 3 lb All-Purpose Flour at once, whisking constantly to form a smooth paste. This is your roux—the foundation of a velvety cheese sauce.

Cook the roux for 3-5 minutes, stirring constantly, until it turns a light golden color and smells nutty. This removes the raw flour taste and builds depth. Don’t let it brown too deeply, or your sauce will darken and take on a toasted flavor that overpowers the cheese.

Gradually whisk in all 10 cups Whole Milk and 16 cups Heavy Cream, a little at a time, ensuring each addition is fully incorporated before adding more. This prevents lumps. Bring the mixture to a gentle simmer, stirring frequently, until it thickens enough to coat the back of a spoon.

Step 3: Build the Cheese Sauce with Depth and Creaminess

Reduce the heat to low and begin adding the cheeses gradually. Start with all 20 lb Sharp Cheddar Cheese and 10 lb Gruyere Cheese, shredded, stirring constantly until each addition is fully melted and smooth. I add the cheese in 5 lb batches to prevent clumping and ensure even melting.

Once the cheddar and gruyere are fully incorporated, stir in all 5 lb Parmesan Cheese, 0.5 cup Dijon Mustard, 0.5 cup Garlic Powder, 0.5 cup Onion Powder, 2 tbsp Ground Nutmeg, 0.5 cup Ground Black Pepper, and 1 tbsp Cayenne Pepper. These seasonings add complexity and balance the richness of the cheese.

Taste and adjust the seasoning with more Kosher Salt if needed. The sauce should be thick but still pourable—it will thicken further as it bakes with the pasta.

Step 4: Combine Pasta and Sauce, Then Bake to Perfection

In a very large mixing bowl or clean kettle, combine the cooked macaroni and cheese sauce, folding gently to ensure every piece of pasta is coated. Avoid vigorous stirring, which can break the pasta. If the sauce seems too thick, thin it slightly with a bit of the pasta cooking water.

Transfer the macaroni and cheese to the prepared baking pans, spreading it evenly. For a golden, crispy top, you can sprinkle additional shredded cheese on top if desired, though this recipe is rich enough without it. Bake in a preheated 375°F oven for 20-25 minutes, until bubbly and lightly golden on top.

Let it rest for 10 minutes before serving. This allows the sauce to set slightly, making it easier to serve neat portions to your crowd.

Regional Styles of This mac and cheese recipe for 100

Southern Comfort Style

Down South, we often add a touch of smoked paprika (2 tbsp) to the cheese sauce for a subtle smoky depth. I also love stirring in 1 cup cooked, crumbled bacon for that classic Southern twist. The smokiness pairs beautifully with the sharp cheddar. 🔥

New England Lobster

In coastal New England, they elevate this dish with 10 lb cooked lobster meat, folded in at the end. Use a light hand to avoid breaking up the tender chunks. The sweetness of the lobster contrasts perfectly with the rich cheese sauce.

Midwest Farmhouse

Midwestern versions often include 2 cups diced roasted butternut squash for a touch of sweetness and color. I roast mine with olive oil and brown sugar first. It adds a lovely autumnal note to the dish.

Texas Two-Step

Texas-style incorporates 2 lb cooked brisket, shredded and mixed in before baking. Add 1 tbsp chipotle powder to the sauce for a subtle heat. The brisket makes this a hearty main dish rather than a side. 💪

Buffalo Blue Cheese

For a bold twist, stir in 1 cup crumbled blue cheese and ½ cup buffalo sauce after combining pasta and sauce. Top with extra blue cheese before baking. This version is perfect for game day crowds.

California Veggie

On the West Coast, we add 5 lb steamed broccoli florets and 2 lb sautéed mushrooms. The veggies add freshness and texture. I like to use a mix of cremini and shiitake mushrooms for depth. 💫

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