Flavors: Blue Razz Blast, Sweet Peach Punch, and Green Apple Crush
Nutrition Facts: 150 Calories, 2.5g Fat, 15g Carbs (0g Fiber & 8g Sugar), 16g Protein
Built Bar has been one of the most talked-about protein bar brands over the past few years, and their Built Puffs line is usually the one that people go crazy for because it’s a great change-of-pace from yoru usual protein bars.
Instead of a dense bar, you get a marshmallow-style center covered in chocolate, which already sets them apart from most of the protein bar aisle.
Now they’ve taken things in a very unexpected direction: sour protein bars.
That alone sounds like something that probably didn’t need to exist, but here we are.
The Built Sour Puffs come in flavors like Sweet Peach Punch, Green Apple Crush, and Blue Razz Blast, and they stick with the same general idea as the original Puffs: a marshmallow-style core with a coating on the outside, although these are candy-coated with a white exterior and sprinkles.
The macros of each sour puff land at about 150 calories, 16 grams of protein, and 8 grams of sugar per bar. It’s also worth noting that Built continues to market these as “16g protein plus collagen,” which is a bit confusing in practice.
The ingredient base is a blend of collagen and whey, but collagen is clearly doing a lot of the heavy lifting here. 150 calories with 16 grams of protein is a pretty insane ratio, but most of the protein coming from collagen is not an ideal protein source for those using this to help hit their fitness goals (protein quality is a bit of a complex topic, but you can find my Protein Quality Calculator here)
With that out of the way, the real question is simple: do sour protein bars actually work?
Built Sour Puffs Texture
Before flavor even enters the picture, the texture is the first thing you notice.
If you’ve had original Built Puffs, this is familiar territory, but slightly different. The center is still soft and marshmallow-like, but it leans chewier and denser than a real marshmallow. Collagen tends to give it a firmer bite, so it’s less “airy fluff” and more controlled chew.
There’s also a layer on the outside that looks like it’d be white chocolate but I guess is just white candy, plus colored sprinkles that match the flavor. The sprinkles actually add a small crunch, which helps break up the chewiness in a good way.
If you’re expecting an experience like Peeps, these are going to be much tougher than expected. Trying to pull one apart doesn’t really work. The marshmallow interior holds together so well that you need a knife if you actually want to see the interior.
Flavor Review: Sweet Peach Punch
Sweet Peach Punch is the first flavor I tried, mostly because peach-flavored snacks are usually hit or miss.
The name is actually pretty accurate. It does come through as a peach-forward candy flavor with a slight “fruit juice” freshness to it. I don’t eat a lot of peach-flavored snacks, but the flavor profile here is exactly what I was expecting.
The sour aspect is much lighter than anticipated, though. These are branded as sour bars, but the tartness is minimal here. It’s much more a sweet peach candy with a hint of tang rather than anything truly sour.
Texture-wise, it was definitely softer than expected once bitten into, and the sprinkles on the outside give it a bit of contrast. That helps, because without that crunch, it would feel overly chewy.
While not as sour as I hoped, the flavor was surprisingly good, and the chewy marshmallow-ish texture actually worked.
Flavor Review: Green Apple Crush
Green Apple Crush is where things start to feel a bit closer to what you’d expect from a “sour” product.
The smell is very candy-like right out of the wrapper, almost like a green apple hard candy or lollipop. The flavor itself is stronger than Sweet Peach, with a sharper apple note and a bit more of a sour punch.
It’s still not aggressively sour, but it’s the closest that any of the flavors come to it.
Much like the peach, the texture contrast of the chewy interior and slight crunch from the sprinkles just works really well.
Assuming the goal was to mimic a sour apple candy in protein bar form, they pretty much nailed it, and it confuses me as much as it delights me.
Flavor Review: Blue Razz Blast
Blue raspberry is one of those flavors that almost always works in candy form. It’s hard to mess up because it’s already kind of a manufactured taste. I mean, the flavor is just… blue.
This bar smells and tastes quite similar to a Jolly Rancher-style blue raspberry candy, but the chewy form holds it back a bit.
That familiar chewy marshmallow center doesn’t really match the sharp, punchy flavor. Maybe it’s because I associate this flavor so much with Jolly Rancher, but the soft chewiness doesn’t feel like the right match for blue raspberry.
Flavor-wise, it’s still good. If you like blue candy, this is a very familiar flavor experience, but I was the least impressed by this one overall.
Are Sour Protein Bars Actually Good?
Built Sour Puffs are one of those products that sound like a gimmick, and to some extent, they are. Sour protein bars aren’t something anyone was asking for, and the execution doesn’t fully lean into the sour concept as much as the branding suggests.
That said, they’re actually… kind of good.
The texture is very similar to original Built Puffs, which is basically an overly-chewy marshmallow. The sprinkles add a nice crunchy contrast, though, and the candy coating works better than the Built Puff chocolate coating, in my opinion.
Flavor-wise, Built nailed all three of these. Sweet peach gives you a refreshing juice-like flavor, green apple accurately captures the tartness of green apple, and blue razz emulates your typical blue hard candy.
The bigger discussion point is still the protein labeling. “16g protein plus collagen” feels like it’s doing work to sound more impressive than it is.
It’s not 16 grams of protein with the added benefit of collagen; it’s 16 grams of protein, mostly from collagen protein.
If you’re buying these, it’s better to think of them as a candy-style snack that happens to contain protein, not a serious protein staple.
Still, they’re a generous size for only 150 calories, and certainly a fantastic way to switch things up from a standard chocolate protein bar.
Do sour protein bars actually work?
Yeah, I guess they do.
