Immediate gratification version: bean burritos.
I’m willing to take the time to cook version: mashed potatoes.
Depending on how much comfort I need:
Tea.
Tea and toast.
Tea and toast with butter and sugar.
Ice cream.
Ice cream straight out of the carton.
Chocolate.
More chocolate.
Single malt Scotch.
Creamy mashed potato, with a soft boiled egg snuggled inside, covered in melted cheese.
Spaghetti Carbonara - creamy, cheesy, garlicky.
Hot chocolate with a shot of Bailey’s in it and cinnamon sprinkled on top.
I agree with MissGypsy and Marge. Potatoes, preferably fried but mashed or boiled are okay, too.
First, I’d like to say that I’ve despised the term “comfort food” ever since I was at a left-wing bake sale which featured an item that was identified as “Guatemalan Comfort Food.” I’m sorry, but any term coined by Faith Popcorn is simply not going to apply to Guatemalan peasants. It assumes a relationship with food which is based on the absolute certainty of eating every day.
That said, mine is a tomato and cheese sandwich, with a bottle of beer.
Before I was diagnosed Diabetic II, my comfort food was:
A bag of Chips Ahoy cookies
A bag of Oreo cookies
A quart of whole milk
Get a mug (wide mouthed, not tall), fill with milk, dunk a Chips Ahoy until it starts to get soft, eat entire cookie in one bite, repeat with an Oreo, continue alternating cookies until both bags are empty, refilling mug with milk as needed.
Nowadays, I don’t think I have a comfort food.
Another vote for Mac & Cheese. It’s gotta be Kraft, and have added to it: chopped red onion, sliced sausage of some sort, Ortega chilis, shredded Monterey Jack Pepper Cheese, a healthy squirt of Sriracha sauce, and maybe some crumbled bacon on top.
Ahhhh…carbohydrate bliss!!! 
Beverages: Green Tea, Coca Cola, Guiness, the strawberry/banana/orange juice smoothie from the local coffee house. Not all at the same time. That would be nasty.
Food: Graham Crackers and Chocolate Chip Frosting, Hostess chocolate covered mini donuts, beef stew.
kambuckta, there is such a thing as chocolate soup. My buddy made it for me a couple times. Think really rich choco milk in a ramekin, with some rum-glazed caramelized bananas in it, and a meringue circle piped on top, run under the broiler til the meringue is crisp. Whoa.
And while I have you here, do you have Wattie’s tomato sauce down there or is that just a Kiwi thing? It is so fuckin good. For we USer’s, it’s Heinz ketchup, really, it’s made by Heinz, but with a huge wallop of clove. It’s incredible. I’m eating my second cold meatloaf sandwich with lots of Wattie’s as we speak. I’ll never eat Merkin ketchup again.
In fall and winter I like a nice hot bowl of homemade chicken soup with lots of rice. I keep some chicken broth in the freezer for that express purpose.
In the summer I prefer cold pasta salad with lots of feta and a side order of fresh corn. Dessert is cold cherries or cantalope.
When I get depressed I lose my appetite. For me, comfort food is for happier times.
Bowl of Crunchy-nut cornflakes.
Bangers and Mash.
Spag-bog.
Chips and gravy.
Chips and curry sauce.
Real pizza. (Not the generic ten inch cheddar-topped crap they produce in most take aways)
These sound interesting. What sort of gravy? What sort of curry sauce? I may have to add on to my list.
Both are a seemingly generic type served at British chippies (many or most chinese take-aways do the same basic ‘dish’ too) The chips are quite different from the the mcdonnalds fry, or restraunt crunchy chip. They are hardly crunchy at all and the curry or gravy take advantage of this. It’s gooey and messy but the taste is commonly gorgeous.
Ooh, now it sounds even better. How can I obtain some? Can I make it myself?
Funny this thread, as I’m in need of comfort food tonight. Whoever said that absence makes the heart grow fonder should be shot, but I digress.
Tonight, do to the lateness of hour and the lack of anything else, Mac and Cheese with hot dogs. Although a trip to an Indian buffet would be heaven on earth, but I doubt that I can find one at this hour. Potato based products with cheese and bacon might work, too.
Kambuckta, just for you … not quite chocolate soup, but comfort food nonetheless.
Take a bit more than a mugful of milk (I like organic, unhomogenised), a tablespoon of good quality Dutch cocoa (no Cadbury’s no, no), two squares (or four, or more) Lindt dark 70 or 85 % chocolate, a teaspoon of sugar, and some cream.
Gently heat the milk in a saucepan, add the cocoa and sugar and stir til dissolved, add the chocolate and allow to melt, stirring constantly. Now bring the chocolate mixture to the point where the milk bubbles up the side, take off the heat and allow the bubbles to subside. Do this a couple more times until the mixture has thickened a little. You could even thicken it a bit more with a little cornflour dissolved in water, in the Italian manner.
Then pour into a mug, top with some cream, and perhaps a little ground cinnamon.
Sip slowly and feel the world set itself to rights.
Good quality vanilla ice cream with honey drizzled on top.
Old-style Aussie burgers I can only by from one take-away shop these days.
Oh! And anything involving raw cake/cookie mix. Especially if it also involves ice cream, or chocolate or fudge. Or all three.
My comfort food? Mashed potatoes, definitely mashed potatoes. 
Mashed potatoes, tinned corned beef, sweet corn and grated cheese…all mashed together with lots of pepper.
I have several dishes I consider comfort food:
good fried chicken
homemade chili
a Wendy’s cheeseburger
homemade chocolate chip cookies or snickerdoodles