Magic Spoon
Marshmallow
TL:DR
In 2 Sentences
It aims for a true cereal‑treat experience—crisp, chewy, marshmallowy—while keeping sugar at 1g and calories at 140, powered by a casein‑plus‑whey protein blend.
When to choose Magic Spoon Marshmallow
Reach for it when you want a sweet, light snack with 12g of complete protein and steadier energy than a syrupy square—post‑workout cool‑down, afternoon slump, or a dessert‑ish nightcap. Skip it if stevia aftertaste or added fibers (like inulin) typically bother you, or if you need a high‑protein meal replacement.
What's in the Magic Spoon bar?
Magic Spoon’s Marshmallow Protein Bar reads like a cereal‑treat makeover: dairy‑based protein (casein with whey concentrate), cassava‑derived fiber for that bendy chew, and sugar‑like sweetness from allulose lifted with stevia and monk fruit.
A little cream and natural flavors round out the marshmallow profile, while almond butter and a bit of palm oil hold the bar together.
The result is a light‑calorie bar on the leaner end of the category that keeps sugar very low by leaning on refined fibers and low‑calorie sweeteners—good for steadier energy than a syrupy marshmallow square, with the caveat that sensitive stomachs may notice the fiber blend.
- Protein
- 12 g
- Fat
- 6 g
- Carbohydrates
- 17 g
- Sugar
- 1 g
- Calories
- 140
Protein
1215MIDThe 12g of protein come from milk proteins—casein (listed first) with support from whey protein concentrate—both complete and highly digestible. Casein digests slowly while whey is quicker, so together they deliver a steady stream of amino acids; lactose is typically low in these purified forms, but anyone with a milk allergy should avoid. The amount sits below many heavy‑hitting gym bars, but the protein quality is top‑tier.
Fat
69LOWFat comes mostly from almond butter (rich in monounsaturated fats and vitamin E), with palm kernel/palm oil and a touch of cream adding firmness and that marshmallow‑treat bite. This means a mix of unsaturated and saturated fats—almonds skew heart‑friendly, while palm and dairy bring more saturated fat for structure. At 6g, it’s comparatively lean yet still satisfying.
Carbs
1720MIDCarbs here are a blend of cassava starch for structure and cassava‑derived soluble fiber (tapioca resistant dextrin) plus chicory inulin for chew and bulk. Allulose—a low‑calorie sugar—and a little glycerin add sweetness and softness without the sharp blood‑sugar rise you’d get from marshmallow syrup, so energy tends to be steadier. If you’re sensitive to fermentable fibers, the blend can be gassy at higher intakes.
Sugar
14LOWOnly 1g of sugar shows up because sweetness leans on allulose (a rare sugar with roughly one‑tenth the calories of sucrose) plus tiny amounts of stevia leaf and monk fruit extracts. Glycerin, a plant‑derived syrup, also lends mild sweetness but doesn’t count toward the sugar line. The trade‑off is that these are refined sweeteners rather than fruit‑based sugars; most people tolerate them well, though very high allulose intakes can be laxative.
Calories
140210LOWThis bar stays light on calories because much of the sweetness comes from low‑energy allulose and non‑digestible fibers, not sugar. More of the total energy comes from protein (12 grams ≈ 48 kcal) and a modest 6 grams of fat (≈ 54 kcal), while the listed carbs contribute less energy than the number suggests. It’s a smart way to keep a nostalgic flavor without a big caloric bill.
Vitamins & Minerals
There aren’t many micronutrient standouts by design. Calcium sits around 10% Daily Value, largely from the dairy proteins and a bit of cream, with smaller amounts of iron likely contributed by almond butter. Think of this as a protein‑and‑texture play, not a fortified bar.
Additives
To recreate a marshmallow‑treat texture without syrupy sugar, the recipe uses a small toolkit: glycerin to keep things soft, sunflower lecithin to emulsify, and high‑intensity sweeteners (stevia and monk fruit) to top off sweetness. The soluble tapioca fiber and chicory inulin are refined fibers added for chew and to lower net carbs. It’s a modern, engineered bar—fewer whole‑food elements than a nut‑and‑date bar, but cleaner than a candy bar.
Ingredient List
Skim cow's milk
Cassava root starch
Corn or beet fructose syrups
Ground roasted almonds
Chicory root
Oil palm fruit
Cow's milk whey
Fats and oils
Cassava root
Cow's milk
What are people saying?
Sources
Range
“I’ve only had their protein bars, and I think they’re really good! Like a healthier rice crispies.”
“I really like these. They have a nice crunch and only 1g sugar.”
“Magic spoon bars at Costco. They taste like rice krispie treats”
Main Praise
Fans love the throwback texture: crisp and bendy, very much in the cereal‑treat lane. Multiple Redditors compared it to a Rice Krispies‑style bar, and an Amazon reviewer called the texture “almost exactly” that—big points for nostalgia.
The macros add to the appeal: 12g of high‑quality milk protein in just 140 calories with only 1g of sugar makes it an easy add to a lunchbox or gym bag without a sugar spike.
Well+Good’s taste test leaned positive too, describing the marshmallow flavor as sweet, nostalgic, and even a little s’mores‑like. For keto‑curious or carb‑managing folks who factor in allulose and added fibers, it often fits neatly as a treat‑ish snack rather than a candy bar.
Main Criticism
The most consistent knock is flavor intensity. Some reviewers find it a bit bland or “protein‑bar first, dessert second,” with a noticeable stevia finish.
Texture can run slightly crumbly depending on the batch, which chips away at that glossy, cohesive marshmallow‑bar fantasy. A few people flagged mild whey notes, and the added fiber blend (tapioca fiber, chicory inulin) can be gassy for sensitive stomachs.
One Redditor reported a numbing mouth sensation—an outlier, but a reminder that sweeteners and fibers can land differently person to person. Finally, 12g protein is solid for a snack but won’t satisfy someone hunting for a 20g post‑lift bar.
The Middle Ground
So, which is it—craveable treat or functional protein bar in a marshmallow costume? The truth lives in the middle.
If you enjoy modern low‑sugar bars and don’t mind a hint of stevia, this nails the ‘grown‑up cereal treat’ brief with crisp texture, steady sweetness, and snackable calories. Reddit user unknown summed up the win succinctly: “tastes like rice krispie treats,” while The Takeout wanted more pop and less crumble.
Both can be true. The sweeteners at play (allulose plus stevia/monk fruit) keep sugar low and energy steadier, but they also create that slightly different sweetness profile some people always notice.
Meanwhile, the casein‑whey combo is excellent quality protein—just not a heavy hitter on quantity. Think of it as a bridge between dessert and gym bar, not a replacement for either.
What's the bottom line?
Magic Spoon’s Marshmallow Protein Bar is a clever compromise: a crispy, marshmallow‑leaning snack with 12g of complete protein, 140 calories, and only 1g sugar. It shines when you want something playful and light that won’t spike your afternoon, and it largely delivers on that nostalgic cereal‑treat promise. Where it stumbles is preference‑based: stevia aftertaste for some, occasional crumble, and fibers that won’t agree with every stomach.
If you’re stevia‑neutral and like a crispy chew, it’s one of the stronger low‑sugar stabs at a childhood favorite. If you want truly dessert‑level flavor or 20+ grams of protein, you’ll likely want a different lane.
As a snackable middle ground? It’s a win—just know what you’re trading to get there.