Cook bacon in a cold skillet over medium heat until crispy, about 8–10 minutes. Drain on paper towels, cool, and crumble, saving a bit for garnish. For easier cleanup, bake at 400°F (200°C) for 15–18 minutes on a parchment-lined sheet.
In a large bowl, mix sour cream and mayonnaise until smooth. Stir in ranch seasoning until evenly blended. For a homemade version, combine dried parsley, dill, garlic powder, onion powder, black pepper, salt, and chives.
Fold in shredded cheddar, bacon, and green onions until well mixed. Reserve a small amount of each for topping.
Cover and refrigerate for at least an hour to let the flavors blend and firm up, or serve immediately if you’re short on time.
Before serving, stir gently and top with extra cheese, bacon, and green onions. Serve with chips, crackers, pretzels, or fresh veggies.