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How to Build a Recipe App: Recipes, Scaling, Shopping Lists and Search

Build a recipe app or site: structured ingredients, serving scaling, unit conversion, shopping lists, search by ingredient, and recipe markup for Google.

Mythex Team · 2026-09-29 · 6 min read

A recipe app is a collection of recipes with good search, clear cooking pages and a couple of kitchen helpers — scaling servings, converting units, and turning recipes into a shopping list. Whether it's your family cookbook, a food blog with recipe cards or a recipe product for others, the one decision that makes everything else work is storing ingredients as structured data, not as a paragraph of text. Get that right and the useful features become easy.

Decide what kind of recipe app it is

The data model is the same across all four. What changes is who can write, and whether pages need to be found by search engines.

What a recipe app needs

Pages

• Recipe list or home — cards with photo, title, total time and tags.
• Recipe page — the cooking view: photo, servings control, ingredient list, numbered steps, notes.
• Search and filters — by name, by ingredient, by tag (vegetarian, quick, dessert), by time.
• Add and edit recipe — a form that handles ingredients line by line.
• Collections — "Weeknight", "Christmas", "Mum's recipes".
• Shopping list — built from one or several recipes.

Data

• Recipes — title, slug, description, servings, prep time, cook time, photo, tags, source, author, visibility.
• Ingredients — recipe, position, quantity, unit, name, note ("finely chopped"), optional group ("For the sauce").
• Steps — recipe, position, text, optional timer.
• Collections and collection items.
• Shopping list items — user, ingredient name, quantity, unit, checked.

Quantities should be numbers. "1 ½ cups" becomes quantity 1.5, unit cup. Keep a small list of units the app understands, and allow free text ("a pinch", "to taste") with no quantity.

Permissions

A personal cookbook needs one account and private recipes. A family cookbook needs shared collections that several people can edit. A public site needs readers (no login) and editors. A community needs members who own their own recipes and moderators who can hide anything.

The features that make it worth using

Scaling servings. Multiply every quantity by new servings ÷ original servings. Display sensible fractions (¾ cup, not 0.75 cup) and round awkward amounts. Some things don't scale linearly — seasoning, baking times, pan sizes — so a short note on the recipe helps.

Unit conversion. A metric/US toggle. Convert volumes and weights within their own type; converting cups of flour to grams needs a density per ingredient, which is a later feature, not a first one.

Cooking mode. Large text, one step at a time or a scrollable list with checkboxes, and the screen kept awake while cooking (browsers support a screen wake lock on many devices). This is the feature people thank you for.

Shopping list. Combine ingredients from several recipes, merge the same ingredient with the same unit, group by aisle, and let people tick items off in the shop.

Search by ingredient. "What can I make with chicken and leeks?" works only because ingredients are separate records. See how to add search to your app.

SEO for public recipe pages

If people should find your recipes through search, each recipe needs its own URL, a unique title and description, and recipe content that is in the HTML when the page loads rather than drawn later by JavaScript. Add schema.org Recipe structured data — ingredients, steps, times, servings, image — generated from your database so it always matches the page. Only include ratings if real people left them on the page. Our guide to what structured data is explains the markup, and Google's own documentation lists the fields it uses.

Example first prompt

Build a family recipe app, designed for phones first. Each recipe has a title, photo, servings, prep and cook time, tags, ingredients and numbered steps. Store each ingredient as its own record with quantity, unit, name and a note, grouped into optional sections like "For the sauce". The recipe page has a servings control that scales every quantity and shows friendly fractions, a metric/US units toggle, and a cooking mode with large text, step checkboxes and a screen that stays awake. Search by recipe name or ingredient, and filter by tag and total time. Users can save recipes into collections and add one or more recipes to a shopping list that merges matching ingredients and lets me tick items off. Family members log in with email and password and share one cookbook that everyone can edit. Save everything in a database and store photos in file storage. Add six sample recipes.

Build steps

1. Recipe page with sample data. Make the cooking view excellent on a phone before anything else.
2. Structured ingredient entry. A form where each line is quantity, unit, ingredient and note. Also offer a "paste a list" box that splits text into lines, then lets the cook fix anything that was split wrongly.
3. Scaling and units. Test with awkward cases: ⅓ cup doubled, 1 egg halved, "salt to taste".
4. Search and filters.
5. Shopping list. Merge "2 onions" and "1 onion" into "3 onions"; keep different units separate rather than guessing.
6. Login and sharing. See how to add login to your app.
7. Photos. Resize on upload so pages stay fast.
8. Public pages and markup (if public). Then publish and check a recipe page's source.

Common mistakes

• Ingredients as one text field. You lose scaling, shopping lists and ingredient search.
• Decimals on screen. "0.333 cups" is unusable. Show fractions.
• Life story before the recipe. On your own app, put the ingredients near the top, with a "jump to recipe" link if there is a story.
• Full-size photos. Phone photos are large; resize and compress them.
• Copying other sites' recipes publicly. Importing for personal use is one thing; republishing someone else's text and photos is another.
• Fake ratings in structured data. Search engines can penalise misleading markup.
• Nutrition numbers presented as exact. If you calculate nutrition, say it's an estimate and name the data source.

When a ready-made recipe app is better

If you want to save and cook your own recipes, established recipe manager apps already import from websites, sync across devices and work offline. For a food blog, blogging platforms with recipe card plugins handle markup and print views out of the box.

Build your own when you want something those tools don't do: a recipe system for a business with costing or allergen tracking, a cookbook shared across a big family with your own structure, recipes tied to a meal plan or store, or a design that is entirely yours. If planning the week's meals is the real goal, read how to build a meal planner app next.

Building it with Mythex

In Mythex you describe the recipe app in chat, check the cooking view in the live preview's phone-size frame, and publish it to a public address that family or readers can open on their phones and add to the home screen. Mythex adds a dedicated Postgres database for recipes and ingredients and file storage for photos when the app needs them. Login is bring-your-own: you choose the approach and the agent wires it in. Mythex builds web apps; native App Store apps are coming soon and aren't available today. For a public recipe site, see the food blog template and our guide to building a mobile-friendly web app.