On this phone

The bar under the name is the map. Swipe it sideways if a destination sits off-screen. On Tonight, the button pinned to the bottom cooks the lead dish.

  1. TonightWhat you can cook first, plus drinks that fit the same shelf.

  2. This weekFive dinners from the shelf, urgent things cooked first.

  3. ShelfEdit what you actually own.

  4. Written methodsEvery dish and drink with a method somebody wrote out.

  5. The pantryStart from one ingredient: what it does, and everything built on it.

  6. Out of itWhat to use instead, judged by the job the missing thing was doing.

  7. Photo reviewReview a demo shelf photo and confirm every item before adding it.

  8. Flavor LabPairings with a track record: classic matches and the mixology behind them.

  9. Wild cardsCombinations with no tradition behind them, only shared aroma notes.

  10. Send to Occasion OSPrepare confirmed shelf availability for Occasion OS.

  11. The fieldThe gap this layer owns.

Keep it on the home screen

  1. iPhone — tap Share, then Add to Home Screen.
  2. Android — open the browser menu, then Install app or Add to Home screen.

After that it opens as Kitchen & Bar, not a browser tab. Inventory stays on this device.

Substitutions · 31 dishes here use it

Out of mayo

An emulsion, which means it is a delivery system for fat and acid at once. It also browns beautifully — spread thin on the outside of a sandwich it toasts better than butter does.

Everything below is judged against that job. A swap that covers it is a swap; one that only looks similar is not.

10 of the 31 dishes here that mention mayo list it as optional — 32% of them. In those, the correct substitution is nothing.

What to reach for

Instead · 1

greek yogurt

one for one

What it gets you
The creamy body and the coating power, with acid already in it.
What it costs you
Fat and richness. A potato salad made with it is a lighter, tangier dish rather than the same one.

Instead · 2

an egg yolk whisked with oil and lemon

one yolk, three quarters of a cup of oil, a teaspoon of juice

What it gets you
Mayonnaise, because that is what mayonnaise is, and it takes four minutes.
What it costs you
Shelf life and the raw egg, which is a decision for some tables.

Instead · 3

mashed avocado with lemon and salt

half an avocado per quarter cup

What it gets you
A rich, spreadable, emulsified fat for a sandwich or a slaw.
What it costs you
Neutrality, and it browns. This is a good idea for lunch and a bad one for a buffet.

Where you can just leave it out · 10

These dishes list mayo as optional. They were written to work without it, so no ratio is needed and nothing has to be bought.

Where the swap will be tasted · 7

These need it and are short enough that nothing hides: 4 required ingredients or fewer, which makes mayo a quarter of what is in the pan. Make the swap a decision rather than a repair.

Check what else is in the pan

The company mayo keeps in this library, counted off required ingredients. A swap that argues with the top two is the wrong swap, whatever a chart says.