Loaded Potato Potluck

8 medium potatoes peeled and cut into 1 in. chunks
1 cup evaporated milk
1/2 c. sour cream
1 tsp salt
1/2 tsp pepper
2 cups shredded cheddar cheese divided
6 slices bacon, cooked, and crumbled, divided
sliced green onions (optional)

Place potatoes in large saucepan. Cover with water; bring to a boil. Cook over medium-high heat for 15 to 20 minutes or until tender; drain. Preheat oven to 350 degrees. Grease 2 1/2 to 3 quart casserole dish. Return potatoes to saucepan; add evaporated milk, sour cream, salt and pepper. Beat with handheld mixer until smooth. Stir in 1 1/2 cups cheese and half of bacon. Spoon mixture into prepared casserole dish. bake for 20 to 25 minutes or until heated through. Top with remaining 1/2 cup cheese remaining bacon, and green onions. Bake for an additional 3 minutes or until cheese is melted.