Costco shoppers love a good deal—and Kirkland Signature Protein Bars offer just that. With 21 grams of protein per bar, minimal sugar, and a bulk price over $20 for a 20-count box, these bars seem like a no-brainer for anyone following a high-protein lifestyle. But what about flavor, texture, and overall satisfaction?
We tested all four flavors—Chocolate Brownie, Chocolate Chip Cookie Dough, Chocolate Peanut Butter Chunk, and Cookies and Cream—to help you decide if they’re worth tossing in your cart.
Chocolate Brownie $26.49/20 Ct
Chocolate Brownie is the most traditional-tasting of the lineup. It leans into rich cocoa notes but has a dense, chewy texture typical of high-protein bars. If you’re used to bars that taste functional rather than indulgent, this one will feel familiar.
Nutritional Facts (per bar):
- Calories: 190
- Total Fat: 7g
- Carbohydrates: 22g
- Sodium: 125mg
- Dietary Fiber: 10g
- Sugar: 1g
- Protein: 21g
Ingredients:
Protein blend (milk protein isolate, whey protein isolate), soluble corn fiber, cashew butter, unsweetened chocolate, erythritol, cocoa butter, natural flavors, sea salt, sunflower lecithin, stevia.
Preparation Instructions:
Ready to eat straight from the wrapper. For a softer bite, microwave for 10 seconds; refrigerate if you prefer a firmer bar.
Chocolate Chip Cookie Dough $26.49/20 Ct
A fan favorite for good reason, this flavor has a softer, slightly more indulgent texture with semi-sweet chocolate chips scattered throughout. While not quite a dessert, it comes close—especially when warmed up.
Nutritional Facts (per bar):
- Calories: 190
- Total Fat: 7g
- Carbohydrates: 22g
- Sodium: 125mg
- Dietary Fiber: 10g
- Sugar: 1g
- Protein: 21g
Ingredients:
Protein blend (milk protein isolate, whey protein isolate), soluble corn fiber, cashew butter, unsweetened chocolate, chocolate chips, erythritol, cocoa butter, natural flavors, sea salt, sunflower lecithin, stevia.
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Preparation Instructions:
Enjoy at room temperature or microwave for 8–10 seconds for a warm, gooey cookie dough-like texture.
Chocolate Peanut Butter Chunk $24.49/20 Ct
If you’re a peanut butter fan, this bar delivers. The chocolate and peanut butter pairing is rich, bold, and satisfying. While less sweet than traditional protein bars, the nutty flavor and chewy texture make it one of the better options.
Nutritional Facts (per bar):
- Calories: 190
- Total Fat: 8g
- Carbohydrates: 22g
- Sodium: 135mg
- Dietary Fiber: 10g
- Sugar: 1g
- Protein: 21g
Ingredients:
Protein blend (milk protein isolate, whey protein isolate), soluble fiber, peanut butter, unsweetened chocolate, erythritol, cocoa butter, natural flavors, sea salt, sunflower lecithin, stevia.
Preparation Instructions:
Best enjoyed at room temperature or chilled for a firm texture. Microwave for a softer, meltier bite.
Cookies and Cream $24.49/20 Ct
While the name suggests an indulgent experience, Cookies and Cream lands somewhere in the middle. It’s less sweet than you’d expect, with a mild flavor and a few cookie bits for crunch. Not a top pick, but decent for variety.
Nutritional Facts (per bar):
- Calories: 190
- Total Fat: 7g
- Carbohydrates: 22g
- Sodium: 130mg
- Dietary Fiber: 10g
- Sugar: 1g
- Protein: 21g
Ingredients:
Protein blend (milk protein isolate, whey protein isolate), soluble fiber, cashew butter, cookie pieces, unsweetened chocolate, erythritol, cocoa butter, natural flavors, sea salt, sunflower lecithin, stevia.
Preparation Instructions:
Ready to eat. Tastes better slightly chilled for a cookie-like crunch.
Our top picks?
- Best overall taste: Chocolate Chip Cookie Dough
- Best for peanut butter fans: Chocolate Peanut Butter Chunk
- Most classic protein bar vibe: Chocolate Brownie
- Most forgettable: Cookies and Cream
Final Thoughts
Kirkland Signature Protein Bars pack serious protein and value into each bar—but don’t expect a gourmet dessert. If you’re watching macros, avoiding gluten, or need a convenient protein boost, these bars are a smart grab.
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