Costco Kirkland Signature Grass-Fed Butter Review

Costco is carrying a new Kirkland Signature Grass-Fed Butter that’s cheaper than its beloved competitor Kerrygold. The butter is made with cream from cows that graze on the lush green pastures of New Zealand all year. Find out why I think the taste is worth making the switch from Kerrygold to Kirkland.

Top down image of the Costco Kirkland Signature Grass-Fed Butter box sitting on a table unopened.
Costco Kirkland Signature Grass-Fed Butter.

Other butters from Costco are the Kirkland Signature Mixed Nut Butter with Seeds, Kirkland Signature Natural Peanut Butter, Kirkland Signature Creamy Almond Butter and the Pisti Spreadable Pistachio Cream.

Image of the back of the box of the butter showing the product description for the butter.
The butter is a product of New Zealand.

Location in Store

We found this butter in Kona, Hawaii in the refrigerated section near the cheese. The item number is 1424237.

Top down image of a white plate with eggs, three sausages and a piece of toast with a big square of butter on the toast.
Amazing on toast!


This is probably the best butter I’ve ever had and I’m someone who loves butter and uses it on everything. If you’ve had Kerrygold butter, this is similar but tastier in my opinion, I find it a lot more flavorful. As soon as you open the butter, you’ll notice it has a deeper, brighter yellow hue compared to regular North American butter.

Closeup image of a hand holding a piece of toast and the toast has a large square of butter on it.
You can see how nice and bright the color of the butter is.

The flavor of the butter is extremely creamy, smooth and just really buttery. It’s not too salty and the sodium content is actually less than Kerrygold. The butter is made with fresh cream from cows who graze on the pastures of New Zealand and the cows have a 95% grass fed diet.

Sideview image of one brick of butter on a white plate.
Very creamy and smooth!

We used this mainly for breakfasts in Hawaii and everyone really enjoyed the butter on their toast and in eggs. My toddler really seemed to enjoy it on her pancakes and waffles too.


The box comes with four eight-ounce bars of butter and we paid $12.01 USD for the box. This is really reasonable and cheaper than Kerrygold butter.

Top down image of the package on a block of butter showing measuring markings to measure the butter.
You can measure the butter using the lines on the wrapper.


The butter needs to be kept refrigerated and the best before date is about six months from when we purchased it. There are four individually packaged blocks of butter in the box. I would absolutely recommend this for baking, I bet it would make amazing cookies, butter tarts or croissants!

Top down image of four individually wrapped blocks of butter sitting on a table.
The box comes with four wrapped blocks of butter.

I wouldn’t leave the butter out on a butter dish for more than a few days without refrigerating it. You really notice how good the butter is and the flavor of it when you simply spread it on a piece of toast or scone.



One tablespoon of butter contains 100 calories, 11 grams of fat, 75 milligrams of sodium, zero grams of carbohydrates and zero grams of protein. Butter has no carbs so that makes it keto-friendly!

Image of the nutrition facts for the butter from the back of the box.
Nutrition facts.


This has the shortest ingredients list, just two ingredients, cream and salt! The butter contains milk from grass-fed cows who feed on the green pastures in New Zealand. It’s gluten-free and nut free.

Image of the ingredients for the butter from the back of the box.


Taste: 10/10

Cost: 9/10

Convenience: 10/10

Nutrition: 4/10 (High in fat and calories).


Must buy!

This butter is amazing and I wish we had it in Canada, if we did that’s all I would be buying.

Have you tried the Kirkland Signature Grass-Fed Butter from Costco? What did you think of it?

Please note that this review was not paid for or sponsored by any third party. This product was purchased by Costcuisine for the purpose of producing this review. The opinions in this review are strictly those of Costcuisine. Costcuisine is not affiliated with Costco or any of its suppliers. In the event that Costcuisine receives compensation for a post from the manufacturer of a product or some other third party, the arrangement will be clearly disclosed (including where the manufacturer of a product provides Costcuisine with a free sample of the product).

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6 thoughts on “Costco Kirkland Signature Grass-Fed Butter Review”

  1. I would love to try this butter but, Unfortunately because of the dairy cartel and our government overlords this butter cannot be sold in Canada.

    • If you or your family were dairy farmers, you probably wouldn’t think that way. Canada’s dairy regulations prevent an influx of inferior products from countries where labour is cheap which drops prices. It helps our farmers to earn a decent living and support their families. Don’t get me wrong, I too would love to have this butter but not at the expense of our high quality dairy industry.

      • I would think that if there were a problem with it and people started to get sick from it, Costco, which has over 850 locations across the world, would definitely stop selling it! Therefore I don’t believe there’s anything to worry about if you do buy it! This is not some mom and Pop store! When they buy butter it’s by the thousands of pounds, no doubt!

        • Sorry but that wasn’t my point. The government wants to protect our dairy business from an influx of non Canadian products, whether high or low quality. They put a tariff on out of country items to prevent them undercutting our local farmers.

  2. I saw a green wrapped Kirkland butter at River Cree Costco but can remember what it was called exactly. It was so busy this Saturday past that I got tired of waiting my turn for that particular cooler and forgot to go back😂


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