Blueberry Old-Fashioned Donut Loaf

This is for anyone who always reaches for the blueberry cake donut first. It is deeply blueberry, buttery, streusel-covered, and finished with a thin vanilla glaze - all in an easy loaf that never needs to be fried.

This egg-free Blueberry Old-Fashioned Donut Loaf is built to recreate the dense, moist crumb and nostalgic flavor of a classic blueberry cake donut rather than a blueberry coffee cake. Freeze-dried wild blueberry powder flavors and colors the entire loaf, dried wild blueberries add concentrated chewy pockets, and blueberry emulsion gives it that unmistakable donut-shop finish.

Blueberry Old-Fashioned Donut Loaf, finished and ready to serve

Surprise me

Finished Blueberry Old-Fashioned Donut Loaf glazed and resting on a cooling rack

How This Recipe Came About

Normally, I would add a pile of jumbo blueberries to a loaf. But I wanted this one to taste like the blueberry cake donut you might grab at a shop like Dunkin'. Fresh, juicy berries would take it closer to coffee cake, and that wasn't what I was after.

I wanted those little chewy pieces of blueberry, with blueberry flavor in the cake around them, too. And I still wanted it to taste like real fruit, even with the sweeter donut-shop flavor I was trying to get.

Ingredient notes

Key ingredients

Wild freeze-dried blueberry powder

This is the main source of natural blueberry flavor and color throughout the crumb. Powder distributes evenly without adding the excess moisture that fresh blueberries would bring.

Dried wild blueberries

These create small, concentrated, chewy blueberry pockets while preserving the dense cake-donut texture. Fresh blueberries would make the loaf wetter and move it closer to coffee cake.

Blueberry emulsion

A bakery emulsion is a bottled flavoring used much like an extract. Its water-based formula is designed to hold its flavor through baking. This recipe uses LorAnn's blueberry bakery emulsion.

The blueberry powder and dried berries bring the fruit. The emulsion adds that nostalgic blueberry cake-donut flavor - the kind that makes this loaf taste like it came straight from the donut case! Use the full teaspoon listed in the recipe.

Coarse sanding sugar

Coarse sanding sugar adds crunch to the streusel top beneath the glaze.

Brands I used for this recipe

These are preferences, not requirements. If you choose the non-dairy route, these are the products I test with. Dairy equivalents can be used at the same listed amounts and temperatures.

Baking dairy-free? See my ingredient guide

Jungle Powders Wild Blueberry Powder

The freeze-dried blueberry powder used to develop this loaf.

Mariani Dried Wild Blueberries

The dried wild blueberries used to develop this loaf.

LorAnn Blueberry Bakery Emulsion

The blueberry emulsion used to develop this loaf.

Modern Mountain Baking Company White Sparkling Sugar

The coarse sparkling sugar I use on my donut loaves.

Forager Unsweetened Plain Yogurt

Smooth, mild, and dependable in cake batters and loaf batters.

Ripple Original

The milk I tested successfully in this loaf.

Country Crock Plant Butter Sticks

The butter sticks I use for the streusel.

Rising Star Baking Supply Vanilla Bean Paste

The vanilla bean paste I use, linked to the 4-ounce Walmart bottle.

Step by step

How It All Comes Together

Step 1
Make the cold vanilla streusel
Whisk the flour, sugar, and salt, then work in the cold butter and vanilla bean paste with your fingertips. Keep a mix of fine crumbs and larger buttery clusters, then refrigerate the streusel while you make the batter.
Start with cold butter for the streusel.
Work the butter into the dry ingredients, leaving some larger crumbs.
Step 2
Mix the blueberry donut loaf batter
Whisk the wet ingredients until completely smooth. Add the dry ingredients and freeze-dried blueberry powder, whisk just until no dry streaks remain, then gently fold in the dried wild blueberries.
The blueberry powder goes in with the dry ingredients.
The mixed batter is thick and purple.
Step 3
Build the middle streusel layer
Spread just under half of the batter into the lined pan, then scatter half of the chilled streusel evenly over it. This creates the buttery seam through the center of the loaf.
Spread just under half of the batter into the lined pan.
Half of the streusel goes in the middle.
Step 4
Cover the middle and finish the top
Add the remaining batter in small spoonfuls and gently spread it over the middle streusel. Scatter the rest of the cold streusel over the top, leaving plenty of the larger clusters intact.
Spoon the remaining batter over the streusel.
Spread gently so the streusel stays underneath.
Finish with the rest of the streusel, keeping the larger crumbs intact.
Step 5
Glaze the slightly warm loaf
Once the baked loaf has rested, move it to a wire rack. Whisk the vanilla glaze until smooth and pourable, spread it over the streusel, and let the excess drip cleanly down the sides.
Pour the glaze over the slightly warm loaf on a rack.
Work across the top and let the extra glaze drip down the sides.
Step 6
Let the glaze set before slicing
Wait until the glaze has set before cutting into the loaf.
Let the glaze set before cutting a slice.

From Instagram

Watch the reel

Watch the blueberry cake-donut batter, buttery streusel, and vanilla crackle glaze come together from bowl to slice.

Open the reel

Overhead view of the finished glazed Blueberry Old-Fashioned Donut Loaf

Troubleshooting

If This Happens

The blueberry powder has hard little pieces

Sift the powder before adding it to the batter. Press any soft pieces through the sieve and discard anything too firm to break down.

The dried blueberries are sticking together

Separate them with your fingers before folding them into the batter. This helps the berries spread through the loaf instead of collecting in one spot.

The batter feels difficult to spread over the middle streusel

Add it in small spoonfuls across the pan, then gently connect those spoonfuls with an offset spatula. This keeps the middle streusel from shifting.

The streusel is browning before the center is ready

Tent the loaf loosely with foil and keep baking. The foil protects the top while the center finishes setting.

It is taking a long time to bake

Every oven is different, and some loaves simply need more time. Make sure to keep the oven door closed instead of checking frequently. If the tester has a very thick, paste-like residue, give the loaf another 3-5 minutes. If the tester looks wetter and more like the unbaked batter, wait 7-10 minutes before checking again.

The tester keeps picking up something wet

Move the tester slightly to the side and check the cake itself. The buttery middle streusel can look wet even when the surrounding crumb is baked.

Before you slice

Texture and serving notes

Serve the loaf warm for the softest crumb, or chill it fully for a denser, more traditional cake-donut bite.

Keep it good

Storage

Fridge

Store covered in the refrigerator for up to 4 days.

Freezer

Freeze individual slices for up to 2 months. Thaw overnight in the refrigerator or at room temperature before serving.

Recipe FAQ

Questions that come up

Can I use fresh blueberries instead of dried blueberries?

I do not recommend that substitution here. Fresh blueberries add moisture and juicy pockets that move the texture toward blueberry coffee cake. Dried wild blueberries keep the crumb dense and cake-donut-like while adding sweet, chewy blueberry pieces. For a separate recipe made with fresh blueberries, try: Gluten-Free Blueberry Coffee Cake

Can I use regular dried blueberries instead of dried wild blueberries?

Yes. I tested this loaf with both dried wild blueberries and regular dried blueberries, and I genuinely loved both versions. Dried wild blueberries are smaller and have a more concentrated blueberry flavor, so they distribute more evenly and give you little chewy pockets throughout the loaf. Regular dried blueberries create larger, softer bursts and still work perfectly well. If you have access to them, my preference is Mariani Dried Wild Blueberries; I found them locally at Fry's and Bashas here in Arizona, as well as on Amazon. Availability varies by location and retailer, so use regular dried blueberries without hesitation if that is what you can find.

What if I only have whole freeze-dried blueberries?

That is perfectly fine. Grind them into a fine powder, then measure the 26 g called for in the recipe. Sift the powder before adding it to the batter so it blends in evenly.

How does blueberry emulsion change the flavor?

The freeze-dried blueberry powder gives the loaf its bright, natural fruit flavor. Blueberry emulsion adds a sweeter, more nostalgic donut-shop blueberry note, making the loaf taste closer to the classic store-bought blueberry cake donut many of us grew up with.

Can I use dairy ingredients?

Yes. I test all of my recipes with non-dairy ingredients, but you can use the plain unsweetened yogurt, milk, and butter you have on hand while keeping the listed amounts and temperatures the same.

How do I know when the loaf is done?

The center should reach 205-210°F (96-99°C), no longer jiggle, and a tester inserted into the cake portion should come out with moist crumbs but no wet batter. Depending on your oven, it may need up to 90 minutes.

Can I make this recipe as muffins?

I have not tested this batter as muffins yet, but you can experiment by lining a standard muffin pan and filling each cup about two-thirds full. Layer a small amount of streusel through the middle and more on top, then bake at 350°F (175°C). Begin checking at 18 minutes; they will likely need about 18-24 minutes. They are done when the centers no longer jiggle and a tester comes out with moist crumbs but no wet batter. Cool the muffins on a rack before glazing.

Will it turn out the same if I use volume measurements?

Often, yes - but not always. Flour and other ingredients can weigh differently from one cup to the next depending on how they are filled or packed, and even humidity can make a difference. That is why I recommend using a scale when you can. These loaves are easy to make, but their ratios are precise. Baking ingredients are expensive, and there is nothing more frustrating than a loaf that does not turn out as expected. Volume measurements are included for convenience, but weighing gives you the closest match to the recipe I tested.

Can I make this recipe gluten-free?

I have not tested this recipe with gluten-free flour, so I cannot guarantee the same texture, rise, or structure. If you would like to experiment, a cup-for-cup (1:1) gluten-free baking blend intended to replace all-purpose flour is the best place to start. Results may differ from the recipe as written.

Recipe card

Blueberry Old-Fashioned Donut Loaf

4.8 out of 5 from 6 ratings

Cozy Project

Finished Blueberry Old-Fashioned Donut Loaf

Prep: 30 min
Bake: 50-90 min
Total: About 2 hr 10 min, including cooling and glaze setting
Yield: One 9x5-inch loaf

Measurement note

For the closest match to the recipe I tested, use grams. Volume measurements are included for convenience, but cups can vary, so I cannot guarantee the exact same result when measuring by volume.

Ingredients

Classic Old-Fashioned Streusel

115 g all-purpose flour115 g (about 3/4 cup + 3 tablespoons + 1 teaspoon) all-purpose flour
80 g granulated sugar80 g (about 6 tablespoons + 1 1/2 teaspoons) granulated sugar
1/2 teaspoon fine sea salt1/2 teaspoon fine sea salt
85 g cold butter, cubed85 g (about 6 tablespoons) cold butter, cubed
1/2 teaspoon vanilla bean paste1/2 teaspoon vanilla bean paste

Blueberry Donut Loaf

260 g all-purpose flour260 g (about 2 cups + 3 tablespoons) all-purpose flour
15 g cornstarch15 g (about 2 tablespoons + 1/2 teaspoon) cornstarch
1 3/4 teaspoons baking powder1 3/4 teaspoons baking powder
1/4 teaspoon baking soda1/4 teaspoon baking soda
3/4 teaspoon fine sea salt3/4 teaspoon fine sea salt
1/4 teaspoon ground nutmeg1/4 teaspoon ground nutmeg
220 g granulated sugar220 g (about 1 cup + 2 tablespoons) granulated sugar
26 g wild freeze-dried blueberry powder26 g (about 2 tablespoons + 1/2 teaspoon) wild freeze-dried blueberry powder
120 g neutral oil120 g (about 1/2 cup + 2 teaspoons) neutral oil
200 g plain unsweetened yogurt, room temperature200 g (about 3/4 cup + 1 tablespoon) plain unsweetened yogurt, room temperature
145 g milk, room temperature145 g (about 1/3 cup + 4 tablespoons) milk, room temperature
1 tablespoon vanilla bean paste1 tablespoon vanilla bean paste
1 teaspoon blueberry emulsion, for a nostalgic blueberry cake donut flavor1 teaspoon blueberry emulsion, for a nostalgic blueberry cake donut flavor
1/2 teaspoon apple cider vinegar1/2 teaspoon apple cider vinegar
85 g dried wild blueberries85 g (about 1/2 cup + 2 teaspoons) dried wild blueberries

Vanilla Crackle Glaze

250 g powdered sugar, sifted250 g (about 2 cups + 1 tablespoon) powdered sugar, sifted
60 g milk60 g (about 1/4 cup) milk
1 teaspoon vanilla bean paste1 teaspoon vanilla bean paste
Pinch fine sea saltPinch fine sea salt

Before Baking

Coarse sanding sugar, for sprinklingCoarse sanding sugar, for sprinkling

Pan used

I personally prefer a light-colored aluminum pan for these loaves. Here is the one I use. Not sponsored. I don't earn a commission from this link.

Glass holds heat longer, so the edges can overbake before the center is done. If you use glass, loosely tent the loaf with foil early, as soon as the top starts to brown. The foil helps protect the top, but it does not stop the sides or bottom from baking too quickly.

Removing the parchment

Carefully lift the loaf onto a wire rack and remove the parchment from underneath. I carefully flip the loaf onto its side, then turn it upside down onto my forearm so I can peel away the parchment without damaging the loaf.

Instructions

1Preheat the oven to 350°F (175°C). Grease and fully line a 9x5-inch loaf pan with parchment paper.
2In a medium bowl, whisk together the flour, granulated sugar, and salt for the streusel. Add the cold butter and vanilla bean paste. Work together with your fingertips until a mixture of fine crumbs and large buttery clusters forms. Refrigerate while preparing the batter.
3In a large bowl, whisk together the granulated sugar, oil, yogurt, milk, vanilla bean paste, blueberry emulsion, and apple cider vinegar until completely smooth.
4Add the flour, cornstarch, freeze-dried blueberry powder, baking powder, baking soda, salt, and nutmeg. Whisk just until combined and no dry streaks remain.
5Fold in the dried wild blueberries just until evenly distributed.
6Spread just under half of the batter into the prepared loaf pan.
7Sprinkle half of the chilled streusel evenly over the batter.
8Carefully spread the remaining batter over the streusel until completely covered.
9Sprinkle the remaining streusel evenly over the top, leaving plenty of large buttery clusters.
10Sprinkle the top lightly and evenly with coarse sanding sugar just before baking.
11Bake for 50-65 minutes, or possibly longer if your oven runs slower. Check the loaf at 45 minutes to see how the streusel is browning and tent loosely with foil if needed. Depending on your oven, the total baking time may extend to 90 minutes. Use the listed doneness cues rather than the clock alone.
12
Before you take the loaf out
Baking time is a guide, not a deadline.
Check the center: Insert a skewer or toothpick into the cake in the center, avoiding blueberries and the streusel layer.
Ready to come out: The center no longer jiggles and the tester comes out clean or with moist crumbs. No wet batter.
Keep baking: Thick, paste-like batter: bake 3-5 minutes more. Wet batter: bake 7-10 minutes more. Then test the center again.
The 205-210°F (96-99°C) range is an extra check. Batter on the tester still means keep baking, even at that temperature.
An underbaked center can collapse as the loaf cools.
13Cool in the pan for 10-15 minutes, then carefully lift the loaf onto a wire rack.
14Once the loaf is on the wire rack and feels warm but no longer hot, whisk together the powdered sugar, milk, vanilla bean paste, and salt until smooth and pourable. Spread the glaze evenly over the top, allowing it to naturally drip down the sides.
15Allow the glaze to set on the counter or in the refrigerator before serving. The loaf can be served warm or fully chilled.

Explore the seriesExplore all Donut Loaf Recipes

Meet the baker

Angela Heckler

Angela Heckler is the recipe developer, baker, and photographer behind Obsessed Cakes. Her Old-Fashioned Donut Loaf series is a growing collection of cake-donut-inspired loaves with soft, deeply moist crumbs, buttery streusel, and crackly glaze. Angela develops and tests every recipe in her Arizona kitchen. Follow Obsessed Cakes on Instagram, TikTok, and YouTube.

Made it? Tell us.

Ratings and reviews

4.86 ratings

Haley

Best thing I have ever made! I bake often and love to make new things. This came up on my feed and I decided to make it. Truly the most nostalgic and deep flavors. My fiance said it was the best thing I have made. Make it!

September 28, 2026