01 - Cook pasta according to package instructions. Drain, rinse under cold water, and set aside to cool completely.
02 - In a large mixing bowl, whisk together sour cream, mayonnaise, and ranch seasoning until smooth.
03 - Add cooled pasta to the bowl, then fold in cheddar cheese, bacon, peas, and green onions. Toss well to combine.
04 - Chill pasta salad in the refrigerator for at least 1 hour to allow flavors to meld.
05 - Garnish with extra bacon, cheddar, or green onions before serving, if desired. Serve cold.