Make the Ranch Butter:
In a small mixing bowl, combine the melted butter with the ranch seasoning mix and freshly minced garlic. Whisk the mixture until the seasoning is evenly distributed and the garlic is fully incorporated. This seasoned butter will serve as the primary flavoring agent, infusing the vegetables and bacon with rich, tangy, herbed goodness.
Combine Everything:
Return the skillet with the reserved bacon grease to medium heat. Add the cooked potatoes and green beans back into the skillet, followed by the crumbled bacon. Drizzle the ranch butter mixture over the contents of the skillet. Using a spatula or large spoon, gently toss everything together to coat evenly. Be careful not to mash the potatoes; aim to mix thoroughly while preserving the shape and texture of each ingredient. Allow the mixture to warm through for 3–4 minutes so the flavors meld together and the butter soaks in slightly.
Serve:
Taste and season with additional salt and freshly ground black pepper if desired. Transfer to a serving dish and garnish generously with chopped fresh parsley for a touch of color and freshness. Serve warm as a robust side dish or even a light main. Leftovers can be stored in an airtight container in the refrigerator for up to 3 days and reheated gently on the stovetop or in the microwave. For best texture, avoid freezing.