Guide

How to preserve
family recipes.

To preserve a family recipe, scan or photograph the original card (the Library of Congress suggests 300 dpi for documents), keep the card flat in an acid-free folder, and type a working copy with modern measurements beside the old ones. Then cook it with the person who made it, and write down or record everything that never made it onto the card.

The card is rarely the whole recipe. In his letter on why Ancestorii exists, our founder remembers his grandmother’s recipe, the one she “never once measured but always got right”, and the wave of her hand whenever anyone asked how much to add. This guide covers both halves: keeping the paper safe, and catching the method before it goes.

Why keep the original card?

Because it holds things a typed copy can’t: the handwriting, the crossings-out, the note in the margin, the splash of butter that shows which recipe got used most. Once it is scanned, you can cook from a copy and let the original rest.

The New York State Archives names acidity, light, and widely fluctuating temperature and humidity as the greatest threats to family papers. A kitchen supplies plenty of the last two. Recipes cut from newspapers are the most fragile: the same archive warns that highly acidic clippings often become yellow and brittle quickly, and suggests separating them from other papers and copying them onto acid-free paper.

What often happens
What archivists recommend
Laminate the card to keep splashes off
Laminate a copy instead: lamination can harm the original and can’t easily be undone
Clip cards together or tape a cutting into a notebook
No staples, rubber bands, tape or glue on anything that matters
Keep the recipe tin by the cooker or on a sunny shelf
Store originals somewhere dark, cool, dry and steady
Fold big sheets to fit the tin
Store loose papers unfolded, in acid-free folders

How do you scan and store old recipe cards?

  1. Scan both sides.

    Notes on the back often matter most: who it came from, or “double it for Christmas”. The Library of Congress suggests scanning documents at 300 dpi, and says greyscale can show handwriting better than two-tone black-and-white scans. Choose colour if the stains or ink colours tell part of the story.

  2. Or use your phone.

    On an iPhone, the Notes app’s Scan Documents tool captures the page automatically when it detects the edges, and saves it as a PDF in the note. Lay the card flat in daylight with no shadow across it. Our guide to scanning with your phone covers glare and settings.

  3. Name every file.

    A name like nan-joan-shortbread.jpg can be found in ten years; IMG_4821.jpg can’t. The Library of Congress suggests starting file names with the date as yyyymmdd when you know it, and saving pages that belong together as one PDF.

  4. Store the originals flat.

    Keep cards unfolded in acid-free, lignin-free folders or sleeves, inside a box. The Library of Congress recommends a cool, relatively dry place (about 35% relative humidity) with as little light as possible, and no paper clips, rubber bands, self-adhesive tape or glue. The New York State Archives adds that “archival” does not mean the same thing as acid-free, so check the label.

  5. Keep two copies of the scans.

    The Library of Congress suggests at least two copies, stored in different places, so one lost phone or house fire can’t take everything.

How do you convert old measurements and gas marks?

Write the modern measure beside the original rather than replacing it, so “8 oz plain flour” becomes “8 oz (about 225 g) plain flour”. The old figure is part of the record and lets someone check your sums. Then cook it once and correct anything that came out wrong.

Weights and volumes

  • 1 ounce (oz) is about 28 g, and 1 pound (lb) about 454 g
  • 1 British pint is 568 ml, as set in UK law
  • 1 gill is a quarter of a British pint, about 142 ml
  • 1 British fluid ounce is a twentieth of a pint, about 28 ml
  • 1 American cup is about 240 ml, and an American pint (2 cups) about 480 ml
  • 1 tablespoon is 15 ml, and 1 teaspoon 5 ml

Gas marks in °C and °F

  • Gas mark 1: 140°C, 120°C fan, 275°F
  • Gas mark 2: 150°C, 130°C fan, 300°F
  • Gas mark 3: 160°C, 140°C fan, 325°F
  • Gas mark 4: 180°C, 160°C fan, 350°F
  • Gas mark 5: 190°C, 170°C fan, 375°F
  • Gas mark 6: 200°C, 180°C fan, 400°F
  • Gas mark 7: 220°C, 200°C fan, 425°F
  • Gas mark 8: 230°C, 210°C fan, 450°F
  • Gas mark 9: 240°C, 220°C fan, 475°F

The pint is the trap. A British pint is about a fifth bigger than an American one, so a pint of milk in a British recipe is more than two American cups. Which? notes that fan ovens typically cook about 20°C lower than conventional ovens, which is why each gas mark has two Celsius figures. When a card only says “a moderate oven” or “a knob of butter”, ask the cook, or start in the middle of the range and watch it closely the first time.

How do you capture what isn’t written down?

Cook it together, with a recorder running. Emory University psychologist Robyn Fivush, who studies family stories, says cooking together is “a perfect time” to tell them, with lines as small as “When I was a little girl, my mother taught me how to cook this dish.” These questions work at the stove:

  • Who taught you to make this?

    Where it came from: a mother, a neighbour, a newspaper or the back of a packet.

  • How do you know when it’s ready?

    Old cards rarely say. The answer is usually a smell, a colour or a sound.

  • How much is a handful?

    Watch, then weigh what they actually use and write it down.

  • When did you make it, and for whom?

    Sundays, birthdays, the winter someone was ill. This is the part the family keeps.

  • What have you changed over the years?

    Recipes drift. Write down both versions, and who prefers which.

  • What goes wrong if you rush it?

    The mistakes are part of the method, and they are never on the card.

Photograph the dish and the cook’s hands at work, and record them explaining one step in their own words.

The card keeps the ingredients. The cook keeps the method.

Can you share or publish family recipes?

Ask the family first: some recipes are secrets. If a recipe came from a cookbook or a magazine, credit it and don’t copy its wording.

On the law, the US Copyright Office says “a mere listing of ingredients is not protected under copyright law”, but a recipe with substantial explanation or directions, or a collection of recipes as in a cookbook, may be. That is US law. Rules differ between countries, so check before you publish anything you didn’t write yourself.

How do you make a family recipe book?

  • Choose the recipes. Start with the dishes the family actually asks for, not every card in the tin.

  • Pair each recipe with a picture. The scan of the original card, the finished dish, or the cook at the stove.

  • Add a few lines of story. Who made it, when it appeared on the table, and one memory of eating it.

  • Test the typed measures. Ask someone who didn’t type it up to cook from your version and mark anything unclear.

Our guide to what to write in a memory book has more on short, specific captions.

How it helps.

Make an album, say “Nan’s recipes”, and upload a photo of each card. Each photo can have a name, a date such as “Christmas 1978”, a story thread where the family add what they remember, and voice notes, recorded or uploaded, so the card and the cook’s voice stay together. Albums are unlimited on every plan, including Free: see how albums work.

In the free iPhone and Android app, a recipe can also be a memory in your private family feed, with up to 10 photos and a voice note. When an aunt remembers it differently (“she always added an extra egg”), she can add her version to the same memory, and the two sit side by side.

To share a recipe with everyone, Our Stories, Ancestorii’s free public feed on the website, has a Food & Recipes topic, and a story can carry up to 10 photos, a video and a voice note. When the collection is ready, a printed Memory Book makes it an A4 landscape hardcover, from £44.99 plus delivery. The book holds photos and short captions, not audio, so put each recipe in as a photo of the card or your typed copy, with its story in the caption.

Questions about family recipes.

How do I preserve my grandmother’s handwritten recipes?

Scan both sides of each card (the Library of Congress suggests 300 dpi for documents) and keep the originals flat in acid-free folders, away from light and steam. Don’t laminate, tape or clip them. Cook from a typed copy, and record her explaining what the card leaves out.

How do I convert old recipes to metric?

1 oz is about 28 g and 1 lb about 454 g (NIST). A British pint is 568 ml and an American cup about 240 ml. Write the metric figure beside the original rather than replacing it, then cook it once and correct anything that comes out wrong.

What is gas mark 4 in Celsius?

Gas mark 4 is 180°C, or 160°C in a fan oven, which is 350°F, according to Which?’s oven temperature conversion table.

Can I publish my family’s recipes?

Ask the family first, because some recipes are secrets. The US Copyright Office says a mere listing of ingredients is not protected under US law, but written directions and cookbooks may be. Rules differ between countries, so credit recipes from books or magazines and don’t copy their wording.

How do I make a family recipe book?

Choose the dishes the family asks for and scan the original cards. Pair each recipe with a picture of the card, the dish or the cook, add who made it and when, and have someone test the typed measures before you print it.

Sources

  1. Library of Congress · Scanning Your Personal Collections (Personal Digital Archiving Series) (accessed October 2026)
  2. Library of Congress · Care, Handling and Storage of Works on Paper (accessed October 2026)
  3. New York State Archives · Caring for Your Treasures: Paper (accessed October 2026)
  4. Apple Support · Scan text and documents in Notes using the iPhone camera (accessed October 2026)
  5. NIST · Metric Kitchen: Cooking Measurement Equivalencies (updated 29 April 2026)
  6. legislation.gov.uk · Weights and Measures Act 1985, Schedule 1 (accessed October 2026)
  7. Which? · Oven temperature conversion table (1 October 2026)
  8. US Copyright Office · What Does Copyright Protect? (FAQ) (accessed October 2026)
  9. Emory University · How family stories help children weather hard times (29 April 2020)

Keep the recipe
and the voice too.

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