Design
Recipe & Meal Planning App
Design an app for browsing recipes, planning weekly meals, and auto-generating a shopping list.
This is a Low-Level Design (LLD) problem. New to LLD vs HLD? Start here.
01 - Why interviewers ask this
It's a good test of unit-aware aggregation — interviewers check whether your shopping-list generator correctly merges "2 tsp" and "1 tbsp" of the same ingredient instead of listing them separately.
02 - Where this system exists in the real world
You interact with this design every day.
Meal planning apps (Mealime, Yummly)
Grocery delivery shopping-list generators
Diet and nutrition tracking platforms
03 - What you'll master
Solve this once. Know it forever.
Normalize units when aggregating ingredients
Scale recipes by serving size correctly
Merge multiple recipes into one shopping list
04 - What you'll design
6 functional · 2 non-functional requirements.
Browse and search recipes by ingredient, cuisine, or dietary tag
5 more requirements inside
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05 - Companies that ask this
You may face this exact question in your next interview.
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