Canning 101: A Beginner's Guide to Home Canning (PREVIEW)

by Le Parfait America

Short answer: Home canning seals food in glass jars and heat-processes it so it keeps on the shelf without refrigeration. For beginners, start with high-acid foods (jams, fruit, pickles, acidified tomatoes) and the boiling water bath method, using a Le Parfait Super Jar or Super Terrine, a fresh rubber gasket, and a tested recipe. This guide walks you through the whole process and links to a step-by-step guide for each part.

Home canning is one of the oldest and most satisfying ways to keep food. With a few jars and a pot of boiling water, you can put up a summer's worth of jam, pickles, and tomatoes that stay good on the shelf for a year or more. This guide covers the essentials for a first-time canner: what canning actually is, which foods are safe to start with, the equipment you need, and the basic steps from clean jar to sealed lid. Each section links to a full how-to guide when you are ready for the detail.

What is home canning?

Canning preserves food by sealing it in an airtight glass jar and heating it. The heat drives out air and stops the microorganisms that cause spoilage, and the seal that forms as the jar cools keeps new air and contaminants out. The result is shelf-stable food: unlike refrigerating or freezing, properly canned high-acid food can sit in the pantry for a year or more.

There are two home canning methods, and the difference matters for safety. Water-bath canning processes jars in boiling water and is the right method for high-acid foods. Pressure canning reaches higher temperatures and is the method required for low-acid foods. This guide, and Le Parfait jars, focus on water-bath canning of high-acid foods. We will point you to the right resources for anything low-acid.

The water-bath method (what Le Parfait jars are built for)

Le Parfait Super Jars and Super Terrines are modern preserving jars made for water-bath canning. As a filled jar heats in boiling water and then cools, air is forced out and the natural rubber gasket and stainless steel wire bail pull the lid airtight. The Super Terrine is the line Le Parfait builds specifically for canning.

These are not antique bail jars. The glass is heat-resistant, the hardware is stainless steel, and the rubber seal is replaceable, so you fit a fresh gasket each time you can and the jar performs reliably batch after batch. Two best practices keep your results safe and consistent: use a new Le Parfait rubber gasket for every canning session, and follow a tested recipe for the right acidity and processing time.

High-acid vs. low-acid foods (the one safety idea to learn first)

The single most important thing a new canner needs to know is the difference between high-acid and low-acid foods, because it decides which method is safe.

  • High-acid foods are safe for water-bath canning. These include most fruits, jams and jellies, pickles, and properly acidified tomatoes. This is where you start, and what Le Parfait jars are made for.
  • Low-acid foods are not safe for water-bath canning. Plain vegetables, beans, meat, poultry, and plain broth fall here. They require dedicated pressure-canning equipment that reaches a higher temperature. If you are not set up for that, refrigerate or freeze those foods instead.

Our full guide to which foods are safe to water-bath can walks through the lists in detail. When in doubt, follow a tested recipe rather than guessing.

What you need to start

  • Jars: Le Parfait Super Jars or Super Terrines, sized to your batch (the 1L / 32 oz is the all-purpose workhorse).
  • Fresh rubber gaskets: one new gasket per jar, per canning session.
  • A water-bath setup: a large pot or water-bath canner deep enough to cover the jars, with a rack to keep them off the bottom.
  • Basic tools: a jar lifter, and a clean cloth.
  • A tested recipe: for the correct acidity and processing time.

The basic steps, start to finish

  1. Prepare your jars. Wash, inspect, and keep them hot until you fill them. See our guide to preparing jars for canning.
  2. Fill with a tested recipe. Leave the headspace the recipe calls for, and wipe the rim clean.
  3. Fit a fresh gasket and close. Use a new Le Parfait rubber gasket and secure the wire bail or lid.
  4. Process in boiling water. Submerge the jars and process for the full time your recipe specifies.
  5. Cool and check the seal. Let the jars cool undisturbed, then confirm each one sealed. Our canning troubleshooting guide covers what to do if one did not.

Where to go next

Ready for the detail? Each step has its own complete guide:

Curious about fermenting instead? See our home fermentation guide. Not sure which jar or size to buy? Start with which Le Parfait jar and size you need, or browse the full preserving jars collection.

Back to News