Cook the pasta according to package directions and drain, but do not rinse.
While the pasta is cooking, brown the butter in a saucepan over medium heat. As the butter melts, it will begin to foam. Remove the foam with a spoon. Continue cooking the butter until it browns.
Place the pasta, browned butter, mizithra, and Romano cheese into a bowl and toss until the pasta is well coated. Garnish with parsley and serve immediately. This dish does not reheat well.