That's hard to answer. There are hundreds of variations, mixing thousands of cheeses. Some like Creamy Stove Top recipes, others Baked and then there is the combination of methods. Of course around here there is Smoked Mac & Cheese Recipes.
I make both Stove Top and Combo Mac & Cheese, depending on what cheese I have and how much time I have to cook. Basic recipe is below...JJ
Stove Top Mac & Cheese
Cheese Sauce
1Stk Butter
8 TBS Flour (1/2Cup)
6C Whole Milk, heated 4 minutes in the Microwave.
1/2 Lb Quality American Cheese*, I use Cooper Sharp or Land-o-Lakes. NO Kraft Singles.
Salt and Pepper to Taste.
2 Lbs Rotini or Shell Pasta., cooked Al Dente.
Melt Butter in a heavy bottom SS Sauce Pan.
Add Flour and cook, stirring constantly, 3 minutes to make a Roux.
Whisk in Milk and heat, stirring, until it begins to bubble and gets thick.
Crumble American Cheese and add a handful at a time, stirring until melted before next addition.*
Adjust sauce seasoning, pour over Pasta and Serve for Stove Top Mac & Cheese.
*Note: You can use any other Melting Cheese you like...BUT...Do Not let the sauce BOIL! Boiling will cause non-processed Cheese to Curdle. Sauce will Break and become Grainy and Greasy.
Baked Mac & Cheese
Grate 8 to 12oz Ex-Sharp Cheddar or other melting Cheese.
Prepare as Above.
Grease a 9"× 13" Baking Dish.
Spread 1/3 of the Mac in the bottom of the Baking dish.
Spread 1/3 of the Grated Cheese.
Repeat Layers, finishing with Grated Cheese.
Bake at 325°F, uncovered, until IT reaches 165°F and Top Browns. About 60 minutes.