Put hot, just-cooked, drained pasta in a preheated serving bowl. Add about 4 tbsp grated cheese and toss rapidly and thoroughly until it begins to melt and cling.

Add half the butter and another 4 tbsp cheese, and toss thoroughly and quickly again.

Add the remaining cheese and turn the pasta over three or four times.

Add the remaining butter, toss until all butter has melted, and serve at once with additional cheese at the table.