Ramada Inn Buttermilk Ranch Dressing

1 (.4 ounce) packet Hidden Valley Original Ranch
    Buttermilk Recipe Salad Dressing Mix
1 cup mayonnaise or sour cream
1 cup buttermilk

Mix contents of packet with buttermilk and mayonnaise. Mix well. Cover and refrigerate at least 30 minutes to thicken. Stir and serve over crisp lettuce.