In a small frying pan, melt butter and add pine nuts, stir over medium heat until nuts are lightly browned, drain on absorbent paper; cool.
Process pine nuts, basil, garlic, cheese and sugar. Add oil in thin stream while motor is operating, process until combined. Add pasta gradually to large saucepan of boiling water, boil, uncovered, until pasta is just tender, drain. Return pasta to saucepan, add basil sauce, toss gently over low heat until heated through.