In a Dutch oven, sauté onion, carrots, and celery in bacon drippings or butter for 5 minutes, until beginning to soften and smell fragrant (no browning required). Stir in garlic and cook for 1 minute at the same heat until fragrant, with visible softened vegetables.

Pour in chicken broth and add ranch seasoning mix, then bring the mixture to a boil. You should see steady, active bubbling across the surface before continuing.

Add egg noodles and cook for 5 minutes, stirring occasionally so they stay submerged and tender. Keep the broth at a gentle boil so the noodles cook evenly.

Add shredded chicken and most of the bacon, then reduce the heat to low. Stir in cream cheese until melted and the broth turns creamy and smooth.

Stir in heavy cream and shredded cheddar until fully smooth and melted, with no graininess. Simmer gently just until the cheese is incorporated and the soup looks glossy.

Season with salt and pepper to taste, then serve topped with the remaining bacon and green onions. The finished soup should look creamy with visible noodle and chicken throughout.