Generate Custom Cake Images with OpenAI GPT & Replicate Flux Schnell

Who’s it for

This template is designed for bakeries, event planners, and e-commerce platforms that want to automatically generate custom cake designs. It’s also ideal for marketers or digital creators who need personalized celebratory visuals for social media or email campaigns.

How it works

This workflow converts simple user input (e.g., “Sarah’s Birthday”) into a creative cake design:

1. Webhook: Captures user input from the Bolt frontend form.
2. OpenAI GPT: Generates a detailed and creative cake design prompt.
3. Replicate Flux Schnell: Produces a unique cake image using the AI-generated prompt.
4. HTTP Response: Sends the final cake image back to the frontend.

How to set up

1. Import this template into n8n.
2. Add your OpenAI API Key under n8n Credentials for the OpenAI Chat Model node.
3. Add your Replicate API Token as an HTTP Header Auth credential (do not hardcode it).
4. Update the Webhook node URL in the Bolt frontend form to send a POST request to n8n.
5. (Optional) Customize the OpenAI prompt in the Prompt Generator node to adjust cake style, colors, or decorations.

Requirements

• n8n account (cloud or self-hosted).
• OpenAI API Key for prompt generation.
• Replicate API Token for AI image generation.
• A Bolt frontend or any form that can call the webhook endpoint.

How to customize the workflow

• Replace "cake" with any product type (e.g., mugs, greeting cards, or T-shirts).
• Add a database node (Google Sheets or Supabase) to log user requests and images.
• Implement input moderation by adding an OpenAI moderation node before the prompt generation.
  Frontend