Pantry:
pasta (usually 5-6 variety/shapes), rice, polenta, marinara sauce, canned beans, canned corn, canned coconut milk, jars of "better than bouillon" for instant broth, canned tuna, flour, sugar, cocoa powder, semi sweet choc, chips, dry cereal, oatmeal, molasses, honey, soy sauce, olive oil, canola oil
Cupboard:
I have a pretty varied spice cupboard, but must haves: chili powder, coriander, cumin, oregano, basil, parsley, turmeric, cinnamon, garlic powder, seasoned salt, peppercorns, kosher salt. baking soda and baking powder, cornstarch,
Freezer: frozen chicken, hamburger, butter, nuts (walnuts, almonds, cashews), frozen fruit, corn, peas, homemade stock, bones I havent made stock from yet.
Fridge: there is almost ALWAYS a carton of eggs we've hard boiled to be ready for snacking/breakfast, plus more uncooked eggs, almond milk, cow milk, a container of either yogurt or sour cream (I use them interchangeably, really, in recipes), some sort of yellow cheese, mozzarella. I also save bacon and chicken fat after I cook, so I usually have little jars of that for cooking and I have a big tub of real lard that I bought from a farmer. great flavor!
In terms of fruits/veggies, we try to never run out of potatoes, onions, bananas, apples, broccoli, carrots, and celery, and mushrooms. I try to have greens and summer squashes in supply, too.