Interview Questions › Product Design

Design a recipe app based on available pantry ingredients

Design a mobile kitchen assistant app that generates delicious, healthy home-cooked recipes based strictly on the leftover ingredients and condiments currently sitting in the user's fridge and pantry.

Context

Households waste over 30% of purchased groceries because they don't know how to combine disparate leftover ingredients into cohesive meals.

Clarifying questions to ask first

• Are recipes generated dynamically via Generative AI or matched against a curated chef database?
• Does the app support dietary restrictions and cooking appliance filters (e.g. Air Fryer only)? (Yes).

How to approach it

1. Understand User Personas: The Frugal Home Cook (wants to avoid food waste and save money), The Exhausted 7 PM Professional (needs a meal in 20 mins without grocery shopping), The Dietary Restrictor (Vegan/Gluten-Free)
2. Address the Core Friction: Manual ingredient entry is tedious and leads to 80% app onboarding drop-off
3. Design Frictionless Input & Cooking Experience:
4. 1. Fridge & Pantry AI Camera Scan: Point camera inside the fridge/pantry for instant multi-ingredient visual detection
5. 2. "Missing Ingredient Tolerance Slider": Filter recipes by "Strictly what I have (0 missing)" vs "Requires 1 common pantry item"
6. 3. Step-by-Step Hands-Free Voice Cooking Mode: "Next step", "Set 5 min timer" without touching phone with messy hands
7. 4. Food Expiration Tracker & Waste Reduction Dashboard

Framework: User Personas & Pain Points (Input Friction) -> Computer Vision Pantry Ingestion -> Smart Recipe Matching & Substitutions -> Hands-Free Kitchen UX -> Metrics

Sample answer

• Taking photos of fridge shelves is 10x faster than typing 15 ingredients; instant visual parsing is the killer acquisition hook
• Users need intelligent substitutions (e.g. using yogurt instead of sour cream)

1. MVP: Multi-item fridge camera scan, recipe matcher with 0-missing ingredient filter, smart ingredient substitution engine, and voice-guided step-by-step cooking timers

Executive design: An AI kitchen companion featuring instant fridge camera scanning, zero-missing-ingredient recipe matching, smart culinary substitutions, and hands-free voice-guided cooking.

What interviewers look for

• Ingredient Ingestion Friction Reduction (Computer Vision)
• Dynamic Recipe Generation & Substitution Logic
• Hands-Free Cooking UI / Voice Assistant
• Food Waste & Cost Savings Quantification