Backyard Maple Syrup
The late-winter ritual: gallons of clear maple sap boiled down forty-to-one into amber syrup, filtered, and hot-packed into jars with a water-bath finish for the pantry.
Ingredients
one batchFrom the garden
- 10 gallons of fresh maple saps — the classic ratio is roughly 40:1 — about 10 gallons of sap boils down to one quart of syrup
Steps
tap a step to dim it as you go- Boil outdoors: set a wide, shallow pan over a propane burner or a steady fire — 10 gallons of sap gives off gallons of steam that will peel paint and wallpaper in a kitchen. Start with a few inches of sap, keep it at a hard boil, and ladle in more as it reduces. Skim the foam as it rises.
- Sap sours fast — keep what you're not boiling cold and start within a day or two of collecting. When the whole batch is combined, reduced to a couple of inches, and turning golden, move it indoors to a smaller, deeper pot where you can control the finish.
- Finish to exactly 7°F above the boiling point of water at your altitude — 219°F at sea level, lower as you climb, so boil a test pot of plain water first and add 7 to whatever your thermometer reads. Watch the pot constantly at the end; near-syrup foams up and boils over in seconds (a tiny dab of butter knocks the foam down).
- While the syrup finishes, wash half-pint or pint jars and keep them hot in a simmering boiling-water canner; prepare the lids. Filter the hot syrup through a dampened wool or orlon syrup filter — cheesecloth won't catch the gritty 'sugar sand' that clouds a jar.
- Reheat the filtered syrup to 180–190°F, pour it into the hot jars leaving 1/4 inch of headspace, wipe the rims, and screw the lids on fingertip-tight.
- Process in the boiling-water bath, jars covered by 1–2 inches, for 10 minutes. Altitude adjustment: 15 minutes at 1,001–6,000 feet, 20 minutes above 6,000 feet. Cool undisturbed 12–24 hours, check the seals, and refrigerate any jar that didn't seal.