Ooo, would you be willing to share your recipe? I tried out a new one that uses 5 different kinds of cheeses...turned out really yummy. I love trying new mac n cheese recipes, though!
I only use three cheeses, but it's how I make my sauce that makes it.
this is my ingredient list
4 cups (1 pound) elbow macaroni
5 tablespoons unsalted butter
4 cups milk
1/2 medium onion, stuck with 1 clove
4 cloves garlic
1 bay leaf
3 sprigs fresh thyme
1 teaspoon dry mustard
2 tablespoons all-purpose flour
2 cups grated Cheddar, plus 1 cup in big chunks
1/2 cup grated Parmesan
Kosher salt and freshly ground black pepper
I add a cup each also of shredded Monterey jack and gruyere(not sure of spelling) but it's similar in flavor to blue cheese. which I mix in with the sauce at the same time as the cheddar.
Heat the oven to 350 degrees F.
Coat a large baking dish with 1 tablespoon butter and set it aside. Put the milk into a saucepan and add the clove studded onion, garlic, bay leaf, thyme, and mustard. Warm over medium low heat until the milk starts to steam, about 10 minutes. Remove from the heat and let the flavors infuse while you make the roux. In a large pot over medium heat add 2 tablespoons butter and the flour. Cook, stirring, for about 2 to 3 minutes; don't let the roux color. Strain the infused milk onto the roux, whisking constantly to avoid lumps. Cook, stirring often, for about 5 minutes until the sauce is thick. Remove from the heat and add 1/2 the grated Cheddar and 1/2 the Parmesan; stir until it is melted and smooth. Taste and adjust seasoning with salt and pepper. Pour this over the macaroni, add the chunks of Cheddar, and mix until well blended; put this into the prepared baking dish. Sprinkle the remaining Cheddar and Parmesan cheeses evenly over the top. Bake until the top is golden and crusty, about 25 to 30 minutes.
I have a picture of it in the "What are you thankful for?" thread. go take a look