Create a Custom GPT Instruction Set for Organizing Family Meal Plans
The topic
OpenAI launches custom GPTs for specific tasks
OpenAI has officially rolled out the ability for users to create and share custom versions of ChatGPT, called 'GPTs'. These custom GPTs can be tailored for specific purposes, such as learning a new skill, brainstorming ideas, or getting recommendations.
Today's framework: RTF — Role · Task · Format
Create a Custom GPT Instruction Set for Organizing Family Meal Plans
You'll end up with a professionally written set of instructions that you can paste into ChatGPT to build your own tailor-made mini-app for family dinners.
The prompt
Role: You are an expert Personal Productivity Assistant and Custom GPT Specialist.
Task: Using the new 'Custom GPT' feature logic, write the precise 'Instructions' text I need to paste into the GPT Builder to create a custom assistant for my family. This assistant must act as a 'Healthy Weekly Meal Planner' for a busy family of four with a $200 weekly budget and one vegetarian member. It should prioritize 30-minute recipes and generate full shopping lists.
Format: Provide a structured 'Instruction' block (approx 150 words) written in the first person ('You are the...'). Include specific sections for: Personality, Core Logic for meal selection, and Output Format for the shopping list.
Result: A ready-to-copy text block for the 'Instructions' field in the GPT Create menu that builds a functional, specialized meal-planning tool.
How to use it
1.Copy the 'Instruction' block provided by the AI.
2.Click 'Explore GPTs' in ChatGPT and then 'Create'.
3.Go to the 'Configure' tab and paste the text into the 'Instructions' box.
4.Save your new GPT and immediately ask it to 'Make a meal plan for next week' to get your first grocery list.
Things to watch for
·AI can fluctuate with grocery prices, so double-check the budget at your local store.
·Privacy: Don't put sensitive family addresses or health records in the custom instructions.
·You can always go back and edit the instructions if you want to add more family members or new dietary rules.
Why this prompt works
The RTF framework provides a clear separation of duties: Role establishes the AI's expertise (a meal planner), Task specifies the precise work (creating a meal plan), and Format dictates the structured output (a daily breakdown with shopping list). This separation ensures the AI doesn't deviate into general advice but rather produces a clean, organized artifact you can use immediately, which is the entire point of using a Custom GPT.
Example AI response
**The 'No-Stress Family Meals' Plan: Week of July 28th**
**Day 1 - Monday:** Sheet Pan Sausage and Veggies (Use kid-friendly Italian sausage; serve with simple rice). 30 min.
**Day 2 - Tuesday:** Tomato Soup and Grilled Cheese Skewers (Cut veggies on the side for parents). 20 min.
**Day 3 - Wednesday:** 'Family Choice' Taco Bar (Pre-cooked ground beef, cheese, beans, tortillas). 25 min.
**Day 4 - Thursday:** Baked Pasta with Hidden Spinach Sauce. 45 min (mostly oven time).
**Day 5 - Friday:** Homemade Pizza Night (Use store-bought crust, kid choice of toppings). 30 min.
---
**Smart Shopping List (Aldi-friendly)**
**Produce:** 1 bag spinach, 2 bell peppers, 1 onion, 1 lb tomatoes.
**Protein:** 1 lb mild Italian sausage, 1 lb ground beef.
**Dairy:** 1 block cheddar, 1 carton milk, 1 jar pizza sauce.
**Pantry/Frozen:** 1 box pasta, 1 bag jasmine rice, 1 box taco shells.
Sample only — your AI's answer will be different. That's the fun part.
Try a variation
Single Adult Wellness
Role: You are a personal wellness coach focused on optimizing energy and minimizing food waste for a single, busy professional. Task: Build a 7-day meal plan for one person, ensuring two healthy work lunches, three quick dinners, and four pre-portioned breakfasts. Use a Mediterranean diet style and incorporate one 'reset' day with leftovers only. Format: Provide the meal plan as a one-page table by day. Below the table, list a single 'Smart Shopping List' organized by aisle (produce, dairy, pantry, protein) with quantities scaled for one person to ensure minimal waste.
Toddler-Friendly Family
Role: You are a registered dietitian who specializes in fun, healthy meals for families with young children (ages 2-5). Task: Create a 7-day dinner plan for a family of four (two parents, two toddlers) that hides vegetables in main dishes and avoids common spicy ingredients. Each meal must take less than 30 minutes total prep and cook time. Format: Output the plan as a list of dinners (Day 1: Hidden Veggie Lasagna). Provide the shopping list categorized by store section, including specific brands of toddler-friendly snacks for backup.
High-Protein Athletes
Role: You are a sports nutritionist providing meal planning for an active family of three (two adults training for a marathon, one teen athlete). Task: Develop a 7-day meal plan focusing on high-protein, complex-carb meals to support endurance training. Plan needs three full meals plus two snacks per person. Format: Display the plan as a weekly schedule table. Below the table, provide a detailed grocery list with macro information per meal and a recommended 'pre-workout' snack list.
Power tips
Save the prompt as a 'Custom GPT' instruction to easily generate new plans monthly without retyping the entire structure.
Tell the AI your weekly budget upfront (e.g., 'Plan must total under $150') to get more cost-effective ingredient suggestions.
If you have leftovers from the previous week, list them in the prompt and ask the AI to incorporate them into Days 1 and 2.
Ask the AI for a 'Sunday Prep Sheet' at the end of the plan, detailing which ingredients to chop, marinate, or cook in advance.
About this framework
RTF — Role · Task · Format
RRole
Tell the AI who to act as.
TTask
State exactly what you want done.
FFormat
Specify how the answer should look.
When it works best
Quick, everyday prompts where you want a clean, predictable answer — emails, summaries, lists, simple explanations.