01 - Cook the pasta according to package instructions until al dente. Drain thoroughly, rinse under cold water to stop cooking, and set aside to cool completely.
02 - In a large mixing bowl, whisk together sour cream, mayonnaise, and ranch seasoning until smooth and fully combined.
03 - Add cooled pasta to the bowl, then fold in cheddar cheese, bacon, peas, and green onions. Toss well until all ingredients are evenly distributed.
04 - Cover and refrigerate pasta salad for at least 1 hour to allow flavors to meld and develop fully.
05 - Garnish with extra bacon, cheddar, or green onions before serving if desired. Serve cold.