Asparagus, potato, and leek soup combines two comforting soups into one: bright spring asparagus, hearty potatoes, and mild, sweet leeks. It tastes like a garden lunch in May, even when you open a jar in the middle of January. This version is prepared for pressure canning so you can enjoy it year-round.
This recipe has been reviewed for safety and accuracy by a Master Food Preserver certified through the University of Cornell Cooperative Extension.
Canning this asparagus, potato, and leek soup follows the same pressure canning guidance used for other hearty vegetable soups. Jars are packed mostly full of vegetables with hot broth filling the gaps, then processed in a pressure canner for the time and pressure required to render low-acid vegetables safe and shelf stable.
The recipe below makes a small two-quart batch, the minimum safe load for a pressure canner, but the proportions are flexible and the recipe scales up to fill a full canner when you have extra vegetables. This write-up keeps the soup vegetarian using vegetable broth, though you can substitute chicken stock for additional richness if desired.
Notes from My Kitchen
I discovered this combination one spring when I had more asparagus than we could eat. I was making an asparagus base and a potato-leek pot at the same time and tasted them together. The blend was unexpectedly good, and it has become a pantry staple ever since.
My family already loves potato-leek soup; the asparagus adds a fresh green lift that keeps the dish from feeling heavy. After opening a jar I usually puree a portion for a smooth bowl, adding a bit of grated parmesan or a spoonful of sour cream. It reheats quickly and makes a satisfying lunch on a cold day.
Quick Look at the Recipe
- Recipe Name: Asparagus, Potato, and Leek Soup
- Recipe Type: Soup for pressure canning (hearty)
- Canning Method: Pressure canning
- Prep Time: About 20 minutes
- Cook Time: About 10 minutes
- Canning Time: Pints 75 minutes, Quarts 90 minutes
- Yield: About 2 quarts (or 4 pints); scales up to fill the canner
- Jar Sizes: Pints and quarts
- Headspace: 1 inch
- Main Ingredients: Leeks, potatoes, asparagus, vegetable broth, salt
- Safe Canning Guidance: University of Alaska hearty soups guidance
- Difficulty: Easy
Choosing the Vegetables
Choose vegetables that tolerate pressure canning. Waxy potatoes such as Yukon Gold or red potatoes keep their shape better than starchy russets, which can break down into the broth. Leeks add a soft, oniony sweetness but must be washed carefully because grit hides between the layers. For asparagus, slimmer spears stay tender through processing; trim off thick, woody ends. If you have extra asparagus, you can can it alone as plain canned asparagus.
Ingredients for Asparagus Potato & Leek Soup
Exact measurements appear in the recipe card below. Here’s what each element contributes and where you can adjust amounts:
- Leeks: Use the white and pale green parts, sliced and washed well. They provide a mild allium backbone and soften into a gentle sweetness.
- Potatoes: Provide body and make the soup filling. Peel and dice into bite-sized pieces so they cook evenly.
- Asparagus: Adds fresh spring flavor. Cut into roughly one-inch pieces after trimming the tough ends.
- Vegetable broth: Fills the jars and carries flavor. Homemade or good-quality store-bought broth both work. Chicken stock can be used if you prefer.
- Salt: For seasoning; it affects taste but not safety, so adjust or omit to suit your needs.
You’ll notice there’s no cream, cheese, flour, or other thickeners listed. Those ingredients are not safe to can in low-acid, hearty soups. Any richening or thickening is added after you open and reheat a jar.
Asparagus Potato & Leek Soup Variations
This recipe follows the University of Alaska hearty soup guidance, meaning jars are packed mostly full of vegetables and processing time and pressure are the critical safety controls. Those parameters must not be shortened, and this soup cannot be processed in a water bath canner because it contains only low-acid vegetables.
You can adjust seasonings before canning—add herbs like thyme or a bit of black pepper without issue. What you cannot add before canning are cream, milk, cheese, butter, or thickeners like flour or cornstarch. Those enrichments are best stirred in when reheating a jar to serve.
Vegetable ratios are flexible: slightly more potato or slightly less asparagus is fine as long as you follow the hearty packing guideline with broth filling gaps and maintaining the correct headspace.
How to Make Asparagus Potato & Leek Soup
Most of the work is prep: washing and chopping the vegetables, bringing them briefly to a simmer with broth to soften slightly, and packing hot into clean jars. The pressure canner completes the cooking and creates the shelf-stable product.
I recommend heating jars and the canner before you begin chopping so everything stays hot and you avoid temperature shock. A hot-pack approach helps vegetables retain a pleasant texture and reduces the risk of jar breakage during processing.
Prepare the Ingredients
Wash and slice leeks, separating layers as needed to remove grit. Peel and dice potatoes into bite-sized pieces. Trim asparagus and cut into about 1-inch lengths. For a two-quart batch, aim for roughly 2 cups sliced leeks, 3 cups diced potatoes, and 3 cups chopped asparagus.
Place the vegetables in a large pot with 2 teaspoons salt and about 4 cups vegetable broth or just enough to cover. Add any herbs you like, bring to a boil, then reduce to a simmer for about 5 minutes to soften the vegetables slightly before packing.
Simmer and Pack the Jars
This recipe uses a hearty pack: fill jars mostly with solids, leaving 1 inch headspace, then ladle hot broth over the vegetables to fill gaps and maintain that 1-inch headspace. A slotted spoon helps place solids first and keep broth separate until ready to pour.
Remove trapped air with a nonmetallic utensil, confirm headspace, wipe rims clean, and apply lids and bands fingertip tight. Place the jars in a preheated pressure canner and follow the processing directions below for time and pressure.
Canning Asparagus Potato & Leek Soup
This is a hot-pack, pressure-canned recipe. The minimum safe load for a pressure canner is 2 quarts (4 pints); the recipe as written produces that amount. Scale up by multiplying ingredients to fill your canner and process by jar size rather than batch size.
Place filled jars in the canner, vent steam for a full 10 minutes, then apply weight and bring to pressure. Process pints for 75 minutes or quarts for 90 minutes. Target pressure is 10 pounds in a weighted-gauge canner or 11 pounds in a dial-gauge canner, adjusted for altitude. Allow a natural pressure release; do not force-cool the canner. When pressure returns to zero naturally, remove jars and let them sit undisturbed for 12–24 hours before checking seals.
Altitude Adjustments
Processing times remain the same at higher altitudes, but required pressures increase. Adjust pressure according to your canner type and elevation:
Dial gauge canners:
- 0–2,000 feet: 11 lbs pressure
- 2,001–4,000 feet: 12 lbs pressure
- 4,001–6,000 feet: 13 lbs pressure
- 6,001–8,000 feet: 14 lbs pressure
Weighted gauge canners:
- 0–1,000 feet: 10 lbs pressure
- Above 1,000 feet: 15 lbs pressure
Tips for Success
Do not puree or thicken the soup before canning; thick, creamy textures prevent safe heat penetration. Puree or add cream, cheese, butter, or thickeners when reheating a jar to serve. Use waxy potatoes for better texture; starchy varieties can break down and cloud the broth. If canning a mixed load of pint and quart jars, process the whole batch for the longer quart time.
Serving Ideas for Asparagus Potato & Leek Soup
To serve, empty a jar into a saucepan and warm on the stove, or heat the contents in a microwave-safe container. Serve chunky and rustic, or blend with an immersion blender for a silky bisque. Add a splash of cream, a spoonful of sour cream or crème fraîche, or a handful of grated parmesan for richness. Finish with a drizzle of olive oil and fresh herbs. The soup pairs well with crusty bread or grilled cheese for a simple, comforting meal.
Yield Notes
A two-quart batch yields about 2 quarts or 4 pints, which is the smallest safe load for a pressure canner. Yield will vary slightly based on chop size and packing. Scaling up is straightforward: keep the same ratios and process jars by size. Never run a pressure canner with less than the recommended minimum load.
Asparagus Potato & Leek Soup FAQs
No. It is a low-acid vegetable soup and must be processed in a pressure canner to reach safe temperatures for shelf stability.
No. Thickeners like flour and cornstarch are not safe for canning in low-acid soups. Thicken on the stove when reheating a jar.
No. Purees are too dense for safe heat penetration in canner processing. Blend after opening a jar.
Properly processed and sealed jars keep best for 12–18 months in a cool, dark place. Refrigerate after opening and use within 3–4 days.
Soup Canning Recipes
Canning Sausage, Potato, and Kale Soup (Copycat Zuppa Toscana)
Canning Taco Soup
Roasted Tomato Basil Soup
Canning Asparagus Potato & Leek Soup
Equipment
- Pressure canner
- Canning funnel
- Canning jars, lids, and bands
Ingredients
- 2 cup leeks, sliced
- 3 cups potatoes, diced
- 3 cups asparagus, chopped
- 2 tsp salt
- 4 cups vegetable broth, plus more to fill as needed
Instructions
- Prepare a pressure canner, jars, and lids. Wash and slice the leeks, peel and dice the potatoes, and trim and chop the asparagus.
- Combine the leeks, potatoes, asparagus, and salt in a large pot. Add vegetable broth to cover and bring to a boil, then reduce to a simmer for 5 minutes.
- Using a slotted spoon, pack the hot vegetables into the jars to the hearty guideline, leaving 1 inch headspace. Ladle hot broth over the top to fill the gaps, keeping 1 inch headspace.
- Release trapped air, adjust headspace if needed, then wipe the rims and set the lids and bands fingertip tight.
- Place the jars in the pressure canner and vent the steam for 10 minutes before adding the weight. Process pints for 75 minutes or quarts for 90 minutes at 10 lbs pressure in a weighted gauge canner or 11 lbs in a dial gauge canner, adjusting for altitude.
- Allow a natural pressure release. Remove the jars and cool undisturbed for 12 to 24 hours, then check the seals.
Notes
Safe canning source: This recipe follows the University of Alaska hearty soup guidelines (publication FNH-00065). Processing time and pressure are the safety controls and cannot be reduced. This is a low-acid soup and cannot be water bath canned.
Do not add before canning: Cream, milk, cheese, butter, flour, cornstarch, and other thickeners; and do not puree before canning. Add any of those when reheating a jar.
Minimum batch: The smallest safe load is 2 quarts (4 pints). Scale up as needed to fill the canner.
Storage: Properly sealed jars store 12–18 months in a cool, dark place. Refrigerate after opening and use within 3–4 days.
Altitude adjustments: See altitude guidance above for required pressures on dial and weighted gauge canners.
Nutrition
Serving: 2 cups — Calories: 253 kcal; Carbohydrates: 57 g; Protein: 9 g; Fat: 1 g; Sodium: 1775 mg; Potassium: 1420 mg; Fiber: 10 g; Sugar: 7 g. Nutrition information is an approximation.
If you enjoy canning soups, try other hearty recipes in your pantry rotation. This asparagus, potato, and leek soup is an easy, flavorful way to preserve spring flavors for months to come.
