We provide breakfast foods in the guests' own full size fridge and small kitchen cabinets.
Coffee, tea, cocoa, milk, small cans of different kinds of sparkling juice, soy or almond milk, English muffins, eggs, pancake mix, butter or margarine, dry cereal, oatmeal, syrup, jams, sugar, other sweeteners, salt, pepper, balsalmic vinegar and olive oil, gallons of drinking water (our tap water is safe but does not taste good.)
We used to provide individual yogurts: too expensive and often outdated. Also used to provide fresh fruit which often spoiled. Now everything is either shelf stable, can be frozen or has a really long refrigerator life. If something is approaching expiration I replace it and move the partially used container into our own house.
We also leave a can of vegetarian refried beans, a package of shelf stable precooked rice and some condiments (ketchup, mayonnaise) in the kitchen. This in case a guest arrives late and is really hungry.
The camper has a nice little kitchen with three burner gas stove, microwave, full size fridge and separate freezer, double sink, toaster, small electric drip coffee maker (we also provide paper filters and a separate filter holder plus kettle), pots, pans, cups, plates, bowls, utensils etc.
Guests are free to cook whatever they like and are expected to clean up after themselves. I always point out the dish drainer (which is tucked away in a cabinet when not in use) and specifically tell them that 'after you do the dishes you can leave them in the drainer on the counter, no need to dry and put them away before you check out.' Since I started doing this, no one has left dirty dishes for me to do.
I stayed in an Airbnb in San Antonio and was extremely disappointed. Although they kindly provided coffee and creamer for the morning the coffee was old, stale and had started out as very cheap poor quality coffee so the result was undrinkable. And the creamer was the artificial powdered kind. I would rather have had nothing than a disappointment. I did send the host a private suggestion that a better coffee, perhaps stored in freezer or in smaller sealed packages, and a nicer option for cream (they make fairly expensive shelf stable 8 oz cartons of whole milk that are easily available on amazon.com) would be a nicer touch.
We get our shelf stable milk and soy milk in quart containers at the Dollar Store very inexpensively and it tastes perfectly fresh when opened.