Still works. Last tested 13th of January 2016.
1. Pass the food test
2. Deliver 40 orders (if you cancel, you’ll get 5 minute penalty) until your mushroom says you can have 10 food.
3. That’s it. It’s best to make ~7 of each food before you do deliveries but it’s up to you (you won’t get 1m/hr if you make food on every delivery instead of taking the food out of your bank).