Peel and chop potatoes. Place in a large pot and cover with water. Boil until tender and drain thoroughly.
Return potatoes to pot and add sour cream and butter. Using a hand mixer, beat until thoroughly combined.
Add garlic salt, pepper, onions, bacon, and cheese. Mix again.
Spray a large glass or ceramic baking dish with nonstick cooking spray and spread potatoes evenly in dish.
Bake for 30 minutes until the top begins to turn golden brown.*
Serve immediately, enjoy!
Notes
*If making this dish ahead and baking the day of service, you may need to add 10-15 minutes onto the cooking time if the potatoes are refrigerator temperature. You can also allow the potatoes to come to room temperature before baking.
Recipe by For the Love of Gourmet at https://fortheloveofgourmet.com/twice-baked-mashed-potatoes/