Baking:
Flour (cream and self-raising mostly, bread and rice flours more recently as well)
Sugar (caster, dark brown, light brown, icing, and now stevia for DD)
Chocolate (good quality for baking - white, milk, 70% dark) or choc chips
Baking powder
Vanilla Extract
Ginger extract
Rosewater
Vanilla pods
Ground almonds
Hazelnuts , walnuts, etc (I buy them whole and chop myself)
Dried fruit - sultanas, raisins, (small amount of Currants), mixed peel, cherries, dried mango, dried apricots, dried apple
Decorative bits and bobs
Family meals: Seasonings:
Olive oil, sunflower oil (and frylight spray for DD)
Sea salt, peppercorns
Dried herbs (basil, oregano, rosemary, thyme)
Spices (cardamom pods, chilli, cayenne pepper, garlic granules, lemon pepper, cloves, cinnamon, mixed spice, star anise, cumin, coriander, …)
Vinegar - I have malt (for chips), white wine, balsamic, cider, and a blackberry one for salads
Honey
Sesame oil
Bisto gravy powder
Cornflour
Fajita and taco seasoning
Chinese sauces (chow mein, chop suey, sweet'n'sour, lemon and honey etc) to add into stir fries or over wings
Stew mixes (to put something into the oven on a timer for the day as we go to work/school that's ready when we get home) - chicken chasseur etc
Rice (easi cook, basmati, thai jasmine, risotto, and pudding)
Pasta (a couple of types of shapes eg penne and fusilli, and long spaghetti, and lasagna sheets)
Chinese noodles
Couscous, bulgar wheat, polenta
Tins:
Tomatoes (whole, diced with herbs in, cherry, puree)
Beans (mixed, cannellini, baked)
Chick peas
Tuna
Corn
Bamboo shoots, water chestnuts
Sardines, clams
Soups
Coconut milk
Jars:
Tomato sauce
Curry
Sweet'n'sour
(I know I mentioned packets of sauces for stir fries, and having tins of tomatoes to make pasta sauce from scratch, and having premade and frozen meals, but sometimes time is not your friend in December and fast solutions as plans change can be needed - so I keep a small selection of GOOD jars for those emergency meal nights).
Olives, roasted peppers
Breakfasts:
Cereal
Dried fruit
Breakfast juice
Jam/marmalade/nutella
Part baked bread rolls (for lots of meals but falls here handily)
Tea, coffee, hot chocolate (sometimes a jar of boveril for bad winters)
Drinks:
Squash (usually 2-3 flavours, we drink a lot)
Fizzy drinks (I usually buy in cans as we don't drink a lot of these, rather than them going flat in larger bottles - but if they would be used, the larger bottles are better value)
Fizzy water
Tonic or preferred mixers
Alcohol (as per your family choices - I get wine, beer and gin generally, but also have a bottle of cream sherry, brandy, whiskey and amaretto - the latter have all lasted years, and get used for both cooking and occasional drinking).
Treats:
Biscuits (I tend to buy a mix of nice packets and store in an airtight tin once opened, rather than buying the mixed tins as there is less waste, or eating for the sake of getting rid of the unwanted ones).
Sweets (similarly, we usually buy a large bag of Leonidas orangettes the week before Christmas rather than a tin of Quality Street...but I usually also have a few boxes of nice chocs for visitors and parties and can give them as hostess presents if visiting someone else)
Crisps - I tend to get a few sharing bags for immediately around Christmas, and a couple of multipacks of family favourites (of different types) for emergency snacking or occasionaly treats
I also have a box of breakfast bars and other snack bars to grab and go (and there's usually some left over mini treats from Halloween to get through)
Cleaning:
Bin bags (black sacks, regular bin liners, compost bin bags, etc)
Washup liquid, dishwasher tablets, dishwasher salt and rinse aid
2 extra pairs of rubber gloves (who knows what jobs you may face unexpectedly, or who might volunteer to washup)
An extra pack of j cloths
All purpose spray cleaner, window cleaner, furniture polish,
drain unblocker, dishwasher detergent (for the machine itself) and washing machine cleaner (ditto)
Handsoap (I get the bottles of liquid soap and just top up nice dispensers beside the sinks)
Kitchen towel
Toilet roll
Cling film
Greaseproof paper
Tin foil
Matches, firelighters, candles/nightlights etc
Spare batteries - AA, AAA, C, D, square, CR2042 (always good to check your smoke alarm batteries in the autumn if you don't do it monthly)
Pain killer, heartburn and indigestion remedy, antihistamines, bandaids, antiseptic cream, antiseptic wipes etc and remember to fill any family prescriptions in good time
Sorry, that feels really long and I've probably forgotten stuff - and I haven't done long life but stored in fridge/freezer items either - I hope it helps.