How Many Calories Are In The New Costco Muffins? | Bakery Math You Need

Costco’s warehouse bakery muffins built a reputation for being huge, sweet, and honestly, kind of heavy. Shoppers loved getting two sleeves and freezing the extras. Lately, though, the bakery case looks different. The chain has rolled out smaller 8-packs, with flavors like Blueberries & Cream, Lemon Raspberry, and Triple Chocolate. These new muffins still taste like dessert, but the calorie hit per piece dropped compared with the old jumbo six-pack muffins that could push well past 600 calories.

Here’s the twist: “smaller” doesn’t mean “light.” A single new muffin still lands around 400 to 460 calories, depending on flavor, going by nutrition info shared by Costco staff and published retail listings. The Blueberries & Cream muffin is around 460 calories and about 28 grams of sugar, Lemon Raspberry is around 420 calories with roughly 25 grams of sugar, and Triple Chocolate lands close to the low 400s. One bite tastes like bakery cake because, well, that’s basically what it is.

Calories In New Bakery Muffins At A Glance

The calorie story around Costco bakery muffins comes down to two eras. There’s the past era: the famous jumbo muffins, sold two six-packs at a time, where one muffin could run near 700 calories. Then there’s the current lineup: eight smaller muffins per clamshell, closer to the size of a coffee shop cupcake, usually in the low-to-mid 400s.

Flavor	Calories Per New Muffin (8-Pack)	Calories Per Old Jumbo Muffin
Blueberries & Cream	~460 cal	Blueberry jumbo: ~580–612 cal
Lemon Raspberry	~420 cal	N/A reported for old jumbo
Triple Chocolate	~390–410 cal	Chocolate jumbo: ~680–690 cal

That table pulls from Costco item listings, nutrition databases that log the jumbo muffins at 5.8 ounces each, and bakery staff calorie sheets quoted in retail reporting. Those jumbo classics were famous for numbers like 609 calories for a single blueberry muffin and about 689 calories for a double chocolate muffin. When you scan those numbers next to your own daily calorie needs, you can see why people treat these muffins like a full breakfast, not just a side pastry.

Next, let’s go flavor by flavor and talk sugar, fat, and realistic portion size. The goal here isn’t to shame a pastry. It’s to make sure you know what you’re getting when you toss a clamshell in the cart.

Costco Muffin Calories Per Flavor And Size Breakdown

Each flavor has its own profile. Some are loaded with chocolate chunks. Some lean on fruit swirl or crumble top. Even with the downsized 8-packs, you’re still getting bakery style batter, rich mix-ins, and a generous crown. That combo is why the calorie count per muffin can rival a fast-food breakfast sandwich.

Blueberries & Cream Muffin

The Blueberries & Cream muffin lands around 460 calories per piece. Reported nutrition sheets from Costco staff also point to roughly 28 grams of sugar and about 25 grams of fat in that one muffin. For context, the Dietary Guidelines for Americans and the U.S. Food & Drug Administration say added sugars should stay under 10% of daily calories, which comes out to about 50 grams of added sugar on a standard 2,000-calorie day. A single Blueberries & Cream muffin can deliver more than half of that sugar limit in one shot.

Texture-wise, shoppers describe this one as sweet and buttery with a soft crumb and a sugary streusel top. The taste leans pastry case dessert, not light breakfast bread.

Lemon Raspberry Muffin

The Lemon Raspberry muffin sits a little lower, around 420 calories. Costco nutritional info shared with retail press pegs it at about 25 grams of sugar and around 23 grams of fat. You still get a frosting-style fruit swirl and sweet crumble, so it’s not “diet bakery.” It’s just a touch lighter than the blueberry-style flavor.

A lot of shoppers view Lemon Raspberry as the “morning muffin,” because citrus + berry reads like breakfast. That can be sneaky. You’re still sitting on a pastry that can hit one fifth of a 2,000-calorie day. If you eat one Lemon Raspberry muffin plus a latte with syrup, you’ve basically eaten a breakfast and a dessert before 10 a.m.

Triple Chocolate Muffin

The Triple Chocolate muffin sits in the low 400s per serving. Costco’s listing for the current Triple Chocolate muffin shows about 410 calories in a single muffin from the 8-pack. Some product roundups have quoted ~390 calories for that same flavor, which still puts it right near the others. The take-home message: chocolate doesn’t always mean “way worse,” but it’s still dessert for breakfast.

One note here: sugar numbers for the Triple Chocolate muffin haven’t been shared as widely as the fruit flavors. The old jumbo double chocolate muffin, though, was a monster at roughly 680 to nearly 700 calories in one 5.8-ounce unit. That gap is the clearest proof that Costco downsized more than just packaging.

Legacy Jumbo Muffins From The Bakery Case

Before the 8-packs showed up, the default was the famous giant muffins sold in sleeves of six. Calorie databases and in-store labels from that era showed numbers like 609 calories for a single blueberry muffin and about 689 calories for a double chocolate muffin. Those muffins weighed around 5.8 ounces each, which helps explain the calorie load.

Costco has been moving toward smaller muffins sold in eight-packs, which are closer to cupcake size, and raising the per-unit price compared with the old “two six-packs for one deal” setup. Shoppers are split. Some people miss the old super-moist jumbo style. Others like having a portion that’s still bakery-level sweet but a bit easier to log and split. Either way, calories per muffin dropped from the high 600s into the low 400s, which is a real shift.

Serving Size Math That Surprises Most Shoppers

A lot of people assume, “It’s just a muffin, I’ll eat it on the drive.” The math says something else. When one smallish muffin lands at 420 to 460 calories, you’re already sitting on a chunk of the day’s intake. That’s before coffee creamer, before bacon, before the rest of breakfast.

The sugar side matters too. The FDA and the Dietary Guidelines for Americans both say added sugars should stay under 10% of daily calories, which equals about 50 grams (roughly 12 teaspoons) on a 2,000-calorie plan. A Blueberries & Cream muffin alone can sit near or above half that added sugars limit. That’s why the smartest way to eat these muffins isn’t “mindlessly while checking email.” It’s “planned treat with protein on the side.”

Next, let’s scale the pastry down. Half a muffin sounds tiny, but a half portion still delivers 200+ calories, which is the same ballpark as a flavored yogurt cup or a granola bar. If you pair that half muffin with eggs or plain Greek yogurt, you get protein to slow the sugar hit, and you keep breakfast from blowing out before lunch.

Muffin Flavor	Half Muffin Calories	Added Sugar Snapshot
Blueberries & Cream	~230 cal (½ of ~460)	~14 g sugar (½ of ~28 g)
Lemon Raspberry	~210 cal (½ of ~420)	~12 g sugar (½ of ~25 g)
Triple Chocolate	~205 cal (½ of ~410)	N/A publicly shared for new size

This “half now, half later” trick lines up with how shoppers say they actually eat these muffins at home: cut in half, wrap the rest, reheat in the air fryer or toaster oven the next morning. Costco fans even mention freezing halves for grab-and-go mornings so the pastry doesn’t turn stale. That move gives you the taste you want, while spreading the sugar over two days instead of dumping all of it in one sitting.

How To Treat A Costco Muffin Like A Planned Treat

You don’t have to quit Costco muffins. You just need a game plan that keeps one pastry from steamrolling the rest of your eating that day. The tips below come from what dietitians usually recommend for pastry-style breakfasts and from what Costco shoppers already do at home.

Split And Freeze

Slice each muffin in half the minute you get home. Freeze halves in small bags. You’ll grab one half when you want a sweet bite with coffee, not grab three full muffins just because they’re on the counter. That tiny setup step does more for calorie control than any “I’ll just have self-control later” promise.

Pair With Protein Or Fiber

A muffin by itself is mostly refined flour, oil, and sugar. The old jumbo chocolate muffin clocked about 36 grams of fat, 81 grams of carbs, and around 10 grams of protein, which shows how carb-heavy and fat-heavy that style can get. When you add eggs, Greek yogurt, cottage cheese, or even a slice of turkey bacon, you slow the sugar rush and stay full longer. That turns half a muffin into something closer to a normal breakfast plate instead of a sugar crash waiting to happen.

Eat It On Busy Mornings, Not Randomly

Save the muffin for a morning when you’re grabbing breakfast on the go, tackling errands, or hitting the road early. In that setting, one 400-plus-calorie muffin makes sense as a “this is breakfast” call. On a slow day at home, that same muffin can quietly become breakfast plus second breakfast plus snacking on the crumbs. That’s when calories creep past what you planned for the day.

Bottom Line On Costco Bakery Muffin Calories

The latest Kirkland Signature muffins in the 8-pack are smaller than the old bakery giants, and that change shaved a couple hundred calories off each muffin. You’re now looking at roughly 400 to 460 calories per muffin for the new flavors like Blueberries & Cream, Lemon Raspberry, and Triple Chocolate, instead of the 600-plus calorie bombs that used to come in the classic two-sleeve deal.

Still, a single new muffin can chew through half your daily added sugar “budget,” based on federal guidance that caps added sugars at under 10% of total calories, or about 50 grams on a 2,000-calorie day. So treat that muffin like a planned treat, not background snacking. Split it, share it, or round it out with protein instead of stacking it next to more pastry. If you want a deeper walk-through on balancing treats with long-term fat loss, you can check our calorie deficit game plan after you’re done here.