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Costco Lemon Blueberry Loaf Review

Written byThe Snarkle-Sauce Posted on Updated on
A slice of Lemon Blueberry Loaf Cake from Costco, sitting on a white plate.

Probably shouldn’t buy this.

If y’all haven’t tried Costco’s Kirkland Lemon Blueberry loaf yet, you probably should. Or maybe you shouldn’t. Probably shouldn’t. It’s seriously addictive. Whatever unholy combination of “natural and artificial flavorings” they’ve added to this product has convinced my brain to eat as much as I can possibly stuff inside me in one sitting. Beware.

Close up of streusel and icing topping on a loaf of Costco Lemon Blueberry Cake from the Kirkland bakery.

The texture is VERY moist, but not soggy. It’s smoother than a muffin, with a fine crumb and silky mouth feel. It’s sweet but not cloying, and the lemon flavor is pleasantly subtle. Personally, I think the loaf tastes homemade and freshly baked because the edges/crust have a slight crispness.

Close up of berries and texture on a piece of Costco Lemon Blueberry loaf cake.

There’s a lovely texture change on top of the loaf from the streusel crumbles. Although I wish the blueberries were more numerous and tangy, they’re fresh and fruity tasting. Sweet, soft blueberries. Big blueberries. Evenly distributed blueberries.* Just not tons of them. Alas.

A loaf of Lemon Blueberry Cake from Costco, sliced open, sitting on white parchment.

Visually, this loaf is attractive enough to serve at an elegant brunch or tea party. The lattice of icing on top adds some fancy flair.

*Unfortunately, as I worked my way through the loaf, the blueberries became more and more scarce. Toward the end, there were only one or two fragments per slice, which was massively disappointing. Alas. I’ve been catfished!

A slice of Costco Kirkland Lemon Blueberry Loaf with almost no blueberries.

This dessert comes in an aluminum pan, but I was able to gingerly dislodge the whole thing for serving, which improves the appearance dramatically. However, I think keeping it inside the pan extends the moistness and freshness, and it IS surprisingly easy to slice and serve right out of the pan. The slices hold together remarkably well.

Ingredients from the label on a package of Costco Lemon Blueberry Loaf.

Ingredients in Costco Lemon Blueberry Cake

Compared to the wholesome elegance of Costco’s Banana Nut Loaf, this ingredient list is rather monstrous:

  • Sugar
  • Bleached Enriched Wheat Flour (Wheat Flour, Malted Barley Flour, Vitamins B3, B1, B2, Iron, Folic Acid)
  • Eggs
  • Blueberries
  • Soybean Oil
  • Icing (Sugar, Water, Sorbitol, Corn Syrup, Pectin, Potassium Sorbate [preservative], Locust Bean Gum, Salt, Mono- & Diglycerides, Citric Acid, Agar, Beta Carotene [color])
  • Water
  • Contains 2% or less of: Butter (Cream and/or Milk, Salt), Modified Corn Starch, Vegetable Shortening (Soybean and/or Palm Oil), Whey, Emulsifiers (Propylene Glycol, Esters of Fatty Acids, Mono- & Diglycerides, Distilled Monoglycerides, Sodium Stearoyl Lactylate, Polysorbate 60, Soy Lecithin, Citric Acid), Egg Yolk, Dextrose, Salt, Wheat Gluten, Leavening (Sodium Bicarbonate, Sodium Acid Pyrophosphate, Sodium Aluminum Phosphate, Monocalcium Phosphate, Dicalcium Phosphate, Tetrasodium Pyrophosphate), Vanilla Extract, Non-Fat Milk, Cellulose, Sodium Caseinate, Natural & Artificial Flavors, Canola Oil, Xanthan Gum, Locust Bean Gum, Guar Gum, Egg Whites, Soy Flour, Calcium Acetate, Sodium Benzoate (preservative).

I mean, soybean oil. Ugh. I do hate soybean oil. I do be hating. I would vastly prefer butter. I would vastly prefer almost anything. Except maybe cottonseed oil. Ugh.

Completely ridiculous side tangent: Am I the only one that is really discouraged by how sloppy many ingredient labels are these days? I mean, we all make typos. But, come on. This is a mass-produced commercial label that surely SOMEONE was paid to proof-read. “Nonfar Milk”? Cellulose is listed twice in a row? I can’t tell where some parenthesis end because a bracket is used instead? Some words run into the next without spacing? I can barely read some of this. Do better, Costco. I believe in you. You can do it.

End tangent.

An aluminum pan containing a loaf of Lemon Blueberry Cake from Costco, sitting on a wooden table.

Servings and Size

Costco’s Lemon Blueberry Loaf costs $8.99 for a 33 ounce package. I’d hazard you could get 8 servings at least from this loaf, which means each serving would cost $1.13.

The Costco item # is 1719747. This is a “Kirkland Signature” (store brand) bakery item.

A cardboard box holding a loaf of Costco Lemon Blueberry Cake, sitting on a wooden table.

Shelf Life

My loaf had a sell-by date a few days after purchase, but I refrigerated it (in the metal pan), and it stayed remarkably moist for 10 days. Much longer than I expected. In fact, it really didn’t change at all in that span of time. Hmmm! I’m aging faster than this cake is!

The End.

More Reviews of Costco Desserts You Might Like (or Hate)

Check out these other reviews of Costco bakery desserts I’ve written:

Author’s note: I was not paid or compensated for this review, and I have no affiliation with Costco.

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