Cook the macaroni to just al dente. I usually cook it a few minutes LESS than what the package says. Drain and set aside.
In a large saucepan melt the butter and add the flour. Stir to combine and cook for a minute. Add the milk and cook, stirring constantly over medium heat until it thickens. This will happen just as the mixture comes close to a simmer. Take off the heat and let cool for a couple of minutes.
Set aside about 1/2 cup of the grated cheese for the topping. Slowly add in the rest of the cheese and jalapenos, stirring until smooth. Stir in the pasta and mix well.
Spoon into individual oven safe serving bowls, or into a skillet or casserole. Put that on a baking sheet to catch any possible drips.
Bake for about 20 minutes, then remove and top with the remaining cheese. Put back under the broiler just until the cheese melts and starts to brown.
Serve right away garnished with jalapeno slices.
https://theviewfromgreatisland.com/4-alarm-macaroni-and-cheese/ November 6, 2015