
Creamy southern baked macaroni and cheese recipe with a secret ingredient is always one of my most popular recipes! This is the best southern baked mac and cheese recipe, the ultimate comfort food for Sunday dinner or a holiday celebration! You'll love this old fashioned mac and cheese with evaporated milk!
Preheat oven to 375°F. Lightly coat a 3-quart casserole dish or 9x13 pan with butter or spray with cooking spray.
Cook macaroni according to package directions, adding 2 minutes to the maximum time listed on the package. Drain; stir butter into macaroni until butter is melted.
While macaroni is boiling, shred both cheese blocks using a box grater. Combine shredded cheese until evenly mix, then set aside about half of shredded cheese mixture for later.
In a large bowl, whisk together mascarpone and evaporated milk until smooth (there may still be some lumps, which are okay).
Mix in the whole milk, followed by the salt, creole seasoning, mustard powder, and nutmeg. Stir in half of the shredded cheese mixture.
Taste mixture to see if seasonings are to your preference and adjust if necessary. Stir in beaten egg.
Add buttered macaroni to milk/cheese mixture and stir to combine. Pour the whole mixture into your prepared casserole dish.
Sprinkle remaining shredded cheese evenly over the top, followed by some fresh cracked pepper, if you like.
Bake in preheated oven for 30-35 minutes or until cheese on top is melted and browned, and filling is bubbling. If you prefer a browner top, place it under the broiler for 2-3 minutes. Cool slightly before serving.