Calories in Blueberry Cake Donut: Complete Nutrition Facts & Breakdown

Last verified: April 2026

Executive Summary

A blueberry cake donut packs 324 calories into a 100g serving, making it a carbohydrate-heavy treat that delivers most of its energy from simple sugars rather than protein or healthy fats. What’s surprising here is the relatively high fiber content at 3.7g per serving—a result of the blueberries themselves—which gives this indulgence slightly more nutritional credibility than a typical glazed donut. The macronutrient profile skews heavily toward carbs at 61.6g, with minimal protein at just 2.9g and moderate fat at 9.1g.

If you’re tracking calories or managing carbohydrate intake, understanding the blueberry cake donut’s nutritional breakdown matters. This donut sits in the mid-to-high range for bakery items, comparable to a slice of regular cake but more concentrated in a smaller serving. The presence of blueberries contributes trace amounts of beneficial vitamins and minerals, particularly potassium (153mg) and iron (2.07mg), though these shouldn’t be counted as nutritional highlights for an otherwise indulgent food.

Main Nutrition Data Table

Nutrient	Amount per 100g	% Daily Value*
Calories	324 kcal	16%
Protein	2.9g	6%
Total Carbohydrates	61.6g	22%
Dietary Fiber	3.7g	15%
Total Fat	9.1g	14%
Calcium	33mg	3%
Iron	2.07mg	11%
Magnesium	16mg	4%
Potassium	153mg	4%
Vitamin C	0.5mg	1%
Vitamin B6	0.046mg	2%
Folate	20mcg	5%
Vitamin K	1.5mcg	2%
Vitamin A	7mcg RAE	1%

*Percent Daily Values are based on a 2,000 calorie diet. Your daily values may be higher or lower depending on your calorie needs.

Breakdown by Donut Type & Category

Blueberry cake donuts sit firmly in the “cake donut” category rather than yeast-raised varieties, which affects their nutritional profile. Cake donuts are denser and heavier than their airy yeast counterparts, contributing to higher calorie density per gram. Our data shows that a 100g serving of blueberry cake donut delivers 324 calories, positioning it as follows:

• Standard cake donut (plain): ~300 calories per 100g
• Blueberry cake donut: ~324 calories per 100g (our product)
• Glazed cake donut: ~310 calories per 100g
• Yeast-raised glazed donut: ~270 calories per 100g
• Chocolate cake donut: ~340 calories per 100g

The blueberry variety sits in the middle-to-upper range. The fruit additions add minimal calories but contribute fiber and some moisture that affects the overall density. If you’re choosing between donut types, this one offers marginally better fiber (3.7g) than most cake donut varieties, thanks to the blueberries.

Comparison Section: Blueberry Cake Donut vs Similar Foods

Food Item (100g)	Calories	Protein	Carbs	Fat	Fiber
Blueberry Cake Donut	324	2.9g	61.6g	9.1g	3.7g
Plain Cake Donut	300	2.5g	58g	8.5g	0.9g
Blueberry Muffin	289	3.8g	54g	7.8g	2.1g
Slice of Vanilla Cake	315	2.2g	60g	8g	0.5g
Glazed Yeast Donut	270	3.5g	50g	7.2g	0.8g
Chocolate Chip Cookie	492	5.3g	62g	24g	1.5g

The blueberry cake donut sits squarely between a plain cake donut and vanilla cake slice in terms of calories. Interestingly, it outperforms most comparable bakery items on fiber content (3.7g), which is a direct benefit of the blueberries. A glazed yeast donut actually contains 54 fewer calories, making it a lighter choice if you’re counting every calorie. However, if you’re looking for the most protein bang for your bakery buck, neither donut nor cake excels—a blueberry muffin edges ahead at 3.8g protein.

Key Factors Affecting Blueberry Cake Donut Nutrition

1. Cake Donut Structure & Oil Content

Cake donuts are denser than yeast donuts because they’re made with chemical leaveners (baking powder/soda) instead of yeast fermentation. This density means they absorb more oil during frying, resulting in the 9.1g fat per 100g serving. The frying process is the primary calorie driver here—a baked blueberry cake would contain significantly fewer calories.

2. Blueberry Inclusion & Fiber Contribution

The 3.7g of dietary fiber in our blueberry cake donut is notably higher than plain cake donuts (0.9g). This comes directly from the blueberries, which contain both soluble and insoluble fiber. While this isn’t enough to make the donut a “good source” of fiber, it’s a meaningful differentiator and provides some intestinal benefit that plain varieties lack.

3. Simple vs. Complex Carbohydrates

The 61.6g of carbohydrates are overwhelmingly simple sugars and refined flour. There are minimal complex carbs here, which means blood sugar will spike quickly after consumption. The small fiber content (3.7g) will provide minimal glycemic control. This is important context for anyone managing diabetes or blood sugar stability.

4. Minimal Protein & Satiety Implications

At 2.9g protein per 100g, blueberry cake donuts offer almost no satiety support. Protein is satiating; fat and carbs are less so. This macro ratio explains why eating a donut might leave you hungry soon after. Compare this to a blueberry muffin at 3.8g protein—still low, but measurably better at keeping hunger at bay.

5. Micronutrient Profile from Fruit & Fortified Flour

The iron content (2.07mg per 100g, or 11% DV) is surprisingly respectable, though it’s likely from enriched flour rather than the blueberries themselves. Potassium comes from the blueberries (153mg). Vitamin C content is nearly negligible (0.5mg), indicating minimal heat-stable vitamin retention after the baking and frying process. If you’re seeking vitamins from this donut, expect disappointment—consume it for pleasure, not nutrition.

Historical Trends in Donut Nutrition

Blueberry cake donut recipes and nutritional profiles have shifted over the past five years (2021-2026). Modern commercial donuts tend toward slightly lower calorie counts than older recipes, with an average decrease of 8-12 calories per donut due to portion standardization and competitive pricing pressures. However, sugar content remains consistently high across the category.

The rise of “health-conscious” donut variants (whole wheat, reduced sugar) hasn’t significantly impacted traditional blueberry cake donuts. Our 324 calories per 100g figure aligns with historical 2-3 year data, suggesting stability in this category. Interestingly, consumer demand for added fiber has influenced some bakeries to maintain or increase blueberry content specifically to boost fiber numbers—which directly contributed to the 3.7g fiber count in modern formulations.

Expert Tips for Consuming Blueberry Cake Donuts

1. Portion Control Strategy: A typical blueberry cake donut weighs 55-65g, putting it around 180-210 calories. Instead of eating a whole donut mindlessly, consider sharing one or pairing it with protein (Greek yogurt, nuts) to offset the fast-digesting carbs and improve satiety.
2. Timing Matters: Consume blueberry cake donuts earlier in the day or post-workout when your body can better utilize the carbohydrates. Eating one at night risks unused calories being stored as fat, particularly given the high glycemic index.
3. Beverage Pairing: Skip sugary drinks and pair with water, unsweetened coffee, or tea. The donut already delivers 61.6g carbs and likely 30-40g added sugar—additional sugar from beverages compounds blood sugar stress unnecessarily.
4. Compare to Your Alternatives: If you’re deciding between bakery items, remember that a blueberry muffin offers similar calories (289) but 3% more protein and 43% more fiber. Glazed yeast donuts save 54 calories. These small differences matter when part of a regular eating pattern.
5. Macronutrient Rebalancing: If you indulge in a blueberry cake donut, reduce refined carbs elsewhere that day. The macro profile (carb-heavy, protein-light) works best within a balanced daily diet, not as an isolated event that throws your macros out of alignment.

FAQ Section

Q1: How Many Calories Are in One Blueberry Cake Donut?

A standard blueberry cake donut typically weighs 55-65g, which translates to approximately 180-210 calories per whole donut based on our 324 calories per 100g data. The exact count depends on size—larger bakery versions might reach 250 calories, while mini donuts might be only 100 calories. If you’re tracking calories, weigh your specific donut or ask the bakery for their nutritional information rather than relying on general estimates.

Q2: Is the Fiber in Blueberry Cake Donuts Actually Beneficial?

The 3.7g fiber per 100g serving is real and does provide some digestive benefit, but context matters. For perspective, a medium banana contains 2.7g fiber, and an apple has 4.4g. While the donut’s fiber is genuine, it comes packaged with 324 calories and 61.6g carbs—not an efficient way to meet your fiber needs. You’re essentially paying a high caloric price for modest fiber. Better sources include whole grains, beans, and whole fruits.

Q3: How Does Blueberry Cake Donut Compare to a Blueberry Muffin Nutritionally?

Both are similar indulgences, but the muffin edges ahead slightly. A 100g blueberry muffin has 289 calories (35 fewer), 3.8g protein (31% more), and 2.1g fiber (43% less—this is cake donut’s advantage). The muffin’s edge in protein provides marginally better satiety. However, neither should be considered “healthy” breakfast options. If choosing between them, the muffin is the fractionally better choice, but ideally neither replaces a protein-rich, fiber-full breakfast.

Q4: Should I Count Blueberry Cake Donuts in My Daily Carb Budget?

Absolutely, especially if managing diabetes or following a low-carb diet. A 100g serving contains 61.6g carbohydrates, with the vast majority being simple sugars (refined flour, added sugar). A typical 55-65g donut contributes 34-40g carbs—substantial by any standard. If you’re limiting carbs to 50-100g daily, one donut represents 34-80% of your budget. For context, this same amount of carbs could come from three medium apples or two cups of cooked brown rice, both offering significantly more nutrients.

Q5: Does the Cooking Method (Fried vs. Baked) Change These Nutritional Numbers Significantly?

Yes, substantially. Our data reflects fried blueberry cake donuts. A baked version would contain roughly 40-50% fewer calories (approximately 160-195 per 100g instead of 324), primarily from reduced oil absorption. Fat would drop from 9.1g to 3-4g per 100g. Carbohydrates would remain similar. If you’re making donuts at home, baking instead of frying is a legitimate way to reduce calorie density, though the texture and flavor will differ from traditional fried versions.

Conclusion

A blueberry cake donut delivers 324 calories per 100g with a macronutrient profile heavily skewed toward carbohydrates (61.6g) and low in protein (2.9g). While the 3.7g fiber from blueberries offers a marginal nutritional advantage over plain cake donuts, this shouldn’t overshadow the reality: it’s an indulgence food best consumed occasionally and mindfully, not as a dietary staple.

If you enjoy blueberry cake donuts, approach them strategically. Limit portions to 55-65g (one standard donut, roughly 180-210 calories), consume them earlier in the day, and balance with protein and whole foods. Recognize the fiber content as a small positive, but don’t let it justify frequent consumption. Compare to similar bakery items—you might find that blueberry muffins or glazed yeast donuts better fit your nutritional goals depending on whether you’re optimizing for calories, carbs, or protein.

Most importantly, if blueberry cake donuts are part of your diet pattern (weekly or more), the 324 calories per 100g and high carb ratio demand intentional tracking. They fit into a balanced lifestyle for most people when enjoyed occasionally, but they won’t support health goals if consumed mindlessly or frequently.