1. Preheat your oven to 350°F (175°C).
2. Wash and peel the russet potatoes, then cut them into uniform cubes.
3. In a large pot, boil the cubed potatoes in salted water until they are tender, about 15-20 minutes.
4. Drain the potatoes and return them to the pot.
5. Mash the potatoes until smooth using a potato masher.
6. In a separate bowl, mix the sour cream, cream cheese, melted butter, milk, garlic powder, onion powder, black pepper, and salt until creamy.
7. Add the creamy mixture to the mashed potatoes and stir until fully combined.
8. Fold in half of the shredded cheddar cheese and the crispy bacon bits, mixing until evenly distributed.
9. Spoon the potato mixture into a greased baking dish, smoothing the top with a spatula.
10. Sprinkle the remaining cheddar cheese on top.
11. Bake in the preheated oven for 25-30 minutes, or until the cheese is melted and bubbly.
12. Once done, remove from the oven and let it cool for a few minutes.
13. Garnish with chopped green onions before serving.

These steps will guide you through making Mississippi Mud Potatoes that are rich, creamy, and truly satisfying.