Pressure cookers cook fast; canners preserve safely.
- Only use a canner for low-acid foods.
- Check pressure accuracy and capacity before buying.
- Electric cookers are not safe for canning.
What is the difference between a pressure cooker and a pressure canner?
Pressure cookers and pressure canners both use steam under pressure, but they serve different purposes. A pressure cooker heats food fast for everyday meals. A pressure canner processes jars of food to kill bacteria for long-term storage. The key difference is pressure control and capacity. Canners maintain a precise pressure, often 10 to 15 PSI, for safe canning. Cookers may fluctuate and lack accurate gauges. According to the USDA, only a pressure canner is safe for low-acid foods like vegetables and meats.
Can you use a pressure cooker as a pressure canner?
Using a pressure cooker for canning is risky unless it meets specific criteria. The USDA recommends a pressure canner with a gauge and at least 4 inches of depth. Many electric pressure cookers cannot maintain steady pressure. They also cool down slowly, which extends processing time. Some stovetop cookers may be suitable if they hold 4 or more quart jars. Check the manufacturer's instructions for canning approval. If unsure, buy a dedicated canner for safety.
Key differences: pressure, capacity, and temperature
Pressure canners typically reach 240°F at 10 PSI, which is essential for killing botulism spores. Pressure cookers often operate at 8 to 12 PSI, but not always accurately. Canners have larger capacities, usually 16 to 23 quarts, to fit multiple jars. Cookers range from 6 to 10 quarts. Canners have a vent pipe and weighted gauge for precise control. Cookers may have spring valves or electric sensors. These differences affect safety and results.
What to look for in a pressure canner
Look for a canner that holds at least 4 quart jars. Check for a dial gauge or weighted gauge for accurate pressure. A canner should have a locking lid and a safety valve. Choose a model with a rack to keep jars off the bottom. Consider the weight; a full canner can be heavy. Stainless steel is durable and resists corrosion. Read reviews for reliability and ease of use.
When to choose a pressure cooker instead
If you cook meals quickly, a pressure cooker is more versatile. It can make soups, stews, rice, and beans in minutes. Electric models are set-and-forget and safe for everyday use. They are smaller and easier to store. If you never preserve food, a cooker is the right choice. But if you garden or buy in bulk, a canner is worth the investment.