I followed the recipe off the back of the Creamette macaroni box. Note: the proportions are for half of the box of noodles!
3 tbsp butter
3 tbsp flour
2 1/2 cups milk
1/2 tsp salt
1/8 tsp pepper
2 cups shredded Cheddar cheese (I just used a whole block which was probably closer to 3 cups)Boil the noodles. Preheat oven to 350. In a saucepan melt butter and stir in flour to the liquid butter. Gradually stir in milk. Stir the mixture constantly over heat until it thickens. Once thickened, mix in the Cheddar cheese. Combine the noodles and sauce and bake for 30 minutes.
Coals were 6 bottom/17 top. I cooked for 30 minutes. I think that's a reasonable amount of time: another 10 minutes might have burned the bottom. As it was the bottom was fine. There was no burnt, crusty top although I think you could achieve it by taking 4 coals off the bottom at the 30 minute mark and putting them on top.
The result was tasty but not very cheesy! I guess you can put an entire block of Cheddar in and only get a bit of cheddar taste. The final sauce was not too smooth but I think that's more due to my roux inexperience. I really wanted a good macaroni and cheese recipe but I guess this one isn't it.