Microwave popcorn. It's convenient enough that I can make it easily any time, but just inconvenient enough that it doesn't all get horked down on the first day.
Nuts. Many kinds of nuts - peanuts, hazelnuts, almonds, cashews... Various mixes, sometimes with dried fruits, then there's the spiced and coated varieties
Dark chocolate. Sweet enough to satisfy sugar cravings, but a low enough sugar content I can chomp on one to get my blood sugar up before going to the corner store for breakfast.
Junk food is a metaphor for thermodynamics. Nothing lasts. if it's in stock, then it's eaten. So I try not to buy any. But even then I will dip strawberries in sugar.
Frozen mango pieces. I love eating those whenever I’m in the mood for something to snack.
Not sure if it counts as junk food, but it’s something I always try to keep at home. Though lately they’ve been sold out at the supermarket. So I’m forced to fall back on my 2nd choice, frozen raspberries.
None. If I crave for something crunchy I eat carrots or nuts. If I want to eat sweets I make my own brownies, marzipan or chocolate chip cookies. And if I really want to each chips/crisps I make my own batch.
Unsalted cashew nuts and french fries. The nuts I eat as is and usually run out by the end of the week. French fries I toss into the air fryier when ever I don't feel like cooking.
Girardhelli brownie mix. Not claiming it's the best ever but it's 100x better than the Betty Crocker or Duncan Hines crap. But there's also the barrier of 5-10 mins prep and 25+ mins baking so it's not instant gratification y'know?
Once you bake a pan though it's pretty great for the next day or two. Assuming you're not too concerned with your waistline.
Edit: Oh and a box is like $3 at Big Lots. But you do have to supply an egg and cooking oil.
Crisps or air fryer party mix containing stuff like frikadellen, chicken nuggets or bitter balls. If you don't know number 1 and 3 then I feel sorry for the sad life you have lived up until now and urge you to get off your ass and find a snack bar somewhere between Zierikzee and Delfzijl.
The only one we keep stocked is milk. We make all kinds of desserts at home, like ice creams, cakes, pies, and pastries, but they never stay around for long.
An off-brand oreo called Kaleidos. Idk what it is but they are better than oreos, and they're cheaper to boot.
Also a bag of milk chocolate chips. spread some peanut butter on bread, sprinkle some chips on top and pop them in the toaster oven. Boom. Toasted PB&C, goes nicely with a small cup of milk. Great when it's cold outside.