How To Make Black Walnut Oil

You can make black walnut oil at home by harvesting mature black walnuts, cracking them open, and extracting the oil from the nutmeat through a pressing process.
 
It sounds a bit intimidating at first, but once you understand the steps, making black walnut oil is totally doable.
 
Black walnuts have a bold, earthy flavor and a rich oil content that makes them perfect for cold-pressing or even a simple homemade extraction.
 
If you’ve been asking yourself how to make black walnut oil, you’re in the right place.
 
In this post, we’ll walk through how to make black walnut oil step by step, including harvesting, drying, cracking, and extracting the oil so you end up with a fresh, fragrant batch.
 
Let’s dive in.
 

How to Make Black Walnut Oil: The Step-by-Step Process

Knowing how to make black walnut oil starts with understanding the full process from tree to bottle.
 
Here are the key steps to make black walnut oil properly.
 

1. Harvest Black Walnuts at the Right Time

To make black walnut oil, you first need to gather black walnuts in late summer to early fall when the hulls are still green but starting to soften.
 
Wear gloves because black walnut hulls stain your hands and clothes with a dark, persistent dye.
 
Collect the nuts as soon as they drop from the tree, and remove the green hulls right away.
 
The hulls are the outer layer that turns mushy and black as the nuts mature, so removing them early makes the rest of the process easier.
 

2. Dry the Nuts Thoroughly

After hulling, spread the black walnuts in a single layer in a warm, dry, well-ventilated area.
 
Let them cure for at least two to four weeks, stirring them occasionally so they dry evenly.
 
Proper drying is crucial when you make black walnut oil because moisture can cause mold and ruin the oil’s flavor.
 
The shells should feel hard and the nutmeat inside should be crisp before you move on.
 

3. Crack the Shells and Remove the Nutmeat

Once dried, crack the black walnut shells with a hammer or a sturdy nutcracker.
 
Black walnut shells are extremely hard, so take your time and be careful not to crush the nutmeat into tiny pieces.
 
Pick out the nutmeat and set it aside in a clean bowl, discarding any shell fragments.
 
This is the part of the process where you’re gathering the raw material that will eventually become your homemade black walnut oil.
 

Methods to Extract Oil from Black Walnuts

There are a couple of ways to make black walnut oil once you have your shelled nutmeat ready.
 
Each method has its own advantages depending on your tools and how much oil you want.
 

1. Cold Pressing for Pure Black Walnut Oil

Cold pressing is the best way to make black walnut oil if you want to preserve its flavor and nutrients.
 
You can use a manual oil press or an electric screw press designed for nuts and seeds.
 
Feed the black walnut pieces into the press slowly, and let it squeeze the oil out into a collecting container.
 
Cold pressing keeps the oil raw, so the resulting black walnut oil retains its rich, nutty aroma and all its natural benefits.
 

2. Blender and Strain Method

If you don’t own a press, you can still make black walnut oil using a blender and a fine mesh strainer or cheesecloth.
 
Grind the nutmeat into a thick paste in a high-speed blender, adding a tiny splash of neutral oil if it needs help blending.
 
Then scoop the paste into cheesecloth and squeeze it over a bowl to collect the oil.
 
This method won’t yield as much black walnut oil as cold pressing, but it works well for small batches.
 

3. Warm Extraction for a Faster Yield

Another way to make black walnut oil is to gently warm the ground nutmeat over low heat.
 
Heat helps the oil release more easily, but you must keep the temperature low to avoid scorching the oil.
 
Stir the nutmeat constantly for about ten to fifteen minutes, then strain the mixture through cheesecloth.
 
This warm extraction method helps you make black walnut oil faster, though it may slightly reduce the shelf life.
 

Storing and Using Your Homemade Black Walnut Oil

Once you’ve finished making black walnut oil, pour it into a clean glass bottle and seal it tightly.
 
Store your black walnut oil in a cool, dark place, or in the fridge for longer freshness.
 
Homemade black walnut oil lasts several months when refrigerated, though cold pressing gives the longest shelf life.
 
You can use your black walnut oil for cooking, drizzling over salads, baking, or even as a finishing oil for roasted vegetables.
 
Many people also use black walnut oil in skincare and woodworking because of its rich, conditioning properties.
 

So, How Do You Make Black Walnut Oil?

You make black walnut oil by harvesting, drying, cracking, and pressing black walnuts to extract their natural oil.
 
The process takes some patience, but learning how to make black walnut oil at home lets you enjoy a fresh, flavorful product you can’t easily buy in stores.
 
Whether you cold press, blend, or use warm extraction, making black walnut oil is a rewarding project worth trying.
 
Hope this guide on how to make black walnut oil helps you get started with your own batch.