Piled so high you can barely see the spud, stuffed baked potatoes are the ultimate comfort food—no matter what comforts you.
Potatoes: Pierce four 6- to 8-oz. potatoes all over with a fork. Place on a baking sheet, rub with olive oil and season. Bake at 425° until tender when pierced with a fork, 50 to 60 minutes. Split the top of each potato, being careful not to cut all the way through. With a fork, fluff potatoes until flesh is airy; season.
Topping: In a saucepan, melt the butter over medium. Add the onions and sugar; season. Cook, stirring occasionally, until golden, about 20 minutes. Add the stock, wine and bay leaf; cook, stirring and scraping up any browned bits from the bottom of the pan, until flavors meld, about 10 minutes. Remove the bay leaf; season. Preheat the broiler. Transfer fluffed and seasoned potatoes to a baking sheet. Divide the onion mixture among the potatoes, then top each with 3 tbsp. cheese. Broil until the cheese is golden brown, 2 to 3 minutes. Sprinkle with thyme.