Hello Margaret. Meal prepping soup for freezing is a fantastic idea, and matching your batch size to the correct cookware volume will make the process much smoother and safer.
Here is the standard formula used in culinary planning:
1. Establish portion size per person:
- Light appetizer or side portion: 1 cup (8 fluid ounces) per person.
- Hearty main meal portion (recommended for meal prepping): 1.5 to 2 cups (12 to 16 fluid ounces) per person.
2. Calculate the base liquid volume:
For 8 people having a full meal-sized portion (2 cups each), you need:
8 people x 2 cups = 16 cups of total soup.
Since 4 cups equal 1 quart, 16 cups equals exactly 4 quarts (1 gallon) of finished soup.
3. Account for cooking buffer and pot headspace:
You should never cook in a pot filled to the brim. To allow comfortable room for stirring, simmering without boil-overs, and accommodating bulky raw ingredients before they cook down, you need a 25 to 30 percent safety margin.
Universal Formula:
(Number of people x Desired cups per person) divided by 4, plus 25 to 30 percent headspace = Ideal pot size in quarts.
For your batch of 8 people:
4 quarts of soup + roughly 2 quarts of headspace = a 6-quart to 8-quart pot.
A standard 6-quart Dutch oven or an 8-quart stockpot will be the perfect size for this task.
I hope this explanation helps with your meal preparation!