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How to Make Black Walnut Syrup
To make black walnut syrup, you tap the trees in late winter and boil down the sap until it thickens into a rich, amber syrup.
It’s a lot like making maple syrup, except black walnut sap has its own unique, nutty flavor that’s absolutely worth the effort.
If you’ve ever wondered how to make black walnut syrup at home, the process is simpler than you might think, though it does take patience and a whole lot of sap.
In this post, we’ll walk through how to make black walnut syrup step by step, from tapping your trees to bottling that golden goodness.
Let’s get into it.
Why Make Black Walnut Syrup
Learning how to make black walnut syrup is a rewarding project, and here’s why it’s worth your time:
1. It Has a Unique, Nutty Flavor
Black walnut syrup tastes different from maple syrup in the best way.
It has a deep, rich, almost buttery flavor with a hint of caramel and, of course, that signature nuttiness.
Many people who know how to make black walnut syrup say it’s even better than maple on pancakes and waffles.
2. Black Walnut Trees Are Everywhere
If you live in an area with black walnut trees, you already have free access to the sap you need.
Black walnut trees grow across much of North America, so finding one to tap is often easier than finding a sugar maple.
That means learning how to make black walnut syrup can be a great way to use what’s already growing around you.
3. It’s a Fun Late-Winter Project
Tapping season for black walnut usually runs from late January through early March, depending on your climate.
It’s the perfect excuse to get outside during that quiet stretch of winter when not much else is happening.
And once you know how to make black walnut syrup, it becomes a tradition you look forward to every year.
How to Make Black Walnut Syrup Step by Step
The process of how to make black walnut syrup comes down to three main stages: collecting the sap, boiling it down, and finishing it.
1. Tap Your Black Walnut Trees
You’ll want to tap when daytime temperatures rise above freezing but nights are still cold.
Drill a small hole about two inches deep into the trunk, angle it slightly upward, and insert your spile.
Hang a bucket or attach tubing to collect the sap as it drips.
2. Collect the Sap Daily
Sap flows best on sunny days after a cold night.
Check your buckets every day and store the sap somewhere cold until you have enough to boil.
Keep in mind that black walnut sap is lower in sugar than maple, so you’ll need more of it when you make black walnut syrup.
3. Boil the Sap Down
Pour your sap into a large, shallow pan and bring it to a rolling boil.
As the water evaporates, keep adding more sap until you’ve worked through your whole batch.
The goal when you make black walnut syrup is to reduce the sap by roughly 40 to 50 parts down to one part syrup.
4. Finish and Filter
Once the syrup starts to thicken, watch it closely so it doesn’t scorch.
Use a candy thermometer and stop when the syrup reaches about 219°F, or seven degrees above the boiling point of water.
Filter it through a fine mesh or felt filter, then pour it into sterilized jars while it’s still hot.
Tips for Making Black Walnut Syrup at Home
A few smart habits make the whole process smoother:
1. Boil Outdoors if You Can
Boiling sap releases a lot of steam and can leave a sticky film on your kitchen walls.
Many people who make black walnut syrup do the bulk of the boiling outside over a fire or propane burner.
2. Keep Finished Syrup Refrigerated
Homemade black walnut syrup doesn’t have preservatives, so store it in the fridge after opening.
For longer storage, you can freeze it or process the jars in a hot water bath.
3. Be Patient With the Process
Learning how to make black walnut syrup takes time, and that’s part of the charm.
A single gallon of finished syrup can require 40 to 50 gallons of sap, so plan for a full day of boiling.
So, How Do You Make Black Walnut Syrup?
You make black walnut syrup by tapping black walnut trees in late winter, collecting the sap, and boiling it down until it thickens into a sweet, nutty syrup.
It takes patience and a lot of sap, but the process is simple and the payoff is delicious.
Now that you know how to make black walnut syrup, all that’s left is to find a tree, grab your supplies, and give it a try.
Once you’ve tasted homemade black walnut syrup, you may never go back to store-bought again.