Start with 4 cups of fresh basil (about 2 big bunches). Wash and dry it like you’re handling a tiny, leafy treasure. Toss it into a food processor with 1/2 cup of toasted pine nuts or walnuts (walnuts are cheaper and just as tasty).
Add 4 cloves of garlic (or more—I’m not your boss), 1 cup of good olive oil, and a big pinch of salt. Pulse until it looks like a green, chunky paste. Then stir in 1 cup of grated Parmesan and 1/4 cup of lemon juice (the acid is crucial for canning safety!).
Basil pesto sauce - SBCanning.com - homemade canning recipes
The canning steps (don’t skip these!)
Fill your sterilized half-pint jars with the pesto, leaving 1/2-inch headspace. Wipe the rims clean—seriously, a crumb of cheese will ruin your seal. Screw on the lids and process in a pressure canner at 10 pounds of pressure for 40 minutes (adjust for altitude if needed).
Let the jars cool naturally. Then listen for that glorious pop as the lids seal. That’s the sound of victory.
