Donut Loaves
Lemon Old-Fashioned Donut Loaf
A bright lemon cake-donut loaf layered with buttery streusel, finished with coarse sparkling sugar, and covered in a tart lemon glaze.
Prep
30 min
Bake
55-67 min
Total
About 2 hr 30 min, including cooling and glaze setting
Yield
One 9x5-inch loaf
A note from my kitchen
Before you bake this
This lemon old-fashioned donut loaf has everything I want from a lemon dessert: a dense, tender cake-donut crumb, plenty of fresh zest, buttery streusel through the middle and over the top, and a tart glaze that settles into every cluster.
The little bit of lemon extract is intentional. Fresh lemon keeps the loaf bright, while the extract adds a light second layer of lemon flavor that makes the whole thing taste especially balanced. Add poppy seeds if you want the variation, or leave them out and let the streusel have the moment.
Save me a slice ;)
Thinking out loud
Lemon Extract or No Lemon Extract?
The cravings, questions, and running commentary behind this bake.
Every time I make a lemon dessert, I end up asking the same question: lemon extract or no lemon extract? I have made this loaf both ways. Without it, I usually lean a little harder on fresh lemon juice in the glaze. You can absolutely try both and tell me where you land.
My husband usually does not like lemon extract - or almond extract, for that matter - so the question carries extra weight in this house. I still prefer this loaf exactly as written. The lemon extract is light, but it adds another layer that makes the fresh lemon taste more rounded and balanced. My husband loves this version too, which is honestly the only review you need.
Read this first
The quick notes.
Flavor
Bright lemon, vanilla bean, butter, and a quiet hint of nutmeg.
Texture
Dense and tender cake-donut crumb with a crisp streusel top and thin lemon glaze.
Best moment
Rubbing the lemon zest into the sugar until the whole bowl smells like lemon.
From this recipe
Tested notes
For a lemon poppy seed variation, add 2 tablespoons poppy seeds to the batter.
Use a clear coarse sanding sugar over the streusel before baking. Modern Mountain Baking Company White Sparkling Sugar is my go-to.
Keep the streusel cold until you are ready to layer it into the pan.
Test the cake portion rather than the streusel seam when checking for doneness.
I test this recipe with Forager Unsweetened Plain Yogurt, Silk Unsweetened Original Soymilk, and Country Crock Plant Butter Sticks. Dairy equivalents can be used at the same listed amounts and temperatures.
Ingredient notes
Key ingredients
Fresh lemon zest
Rubbing the zest into the sugar releases its fragrant oils and spreads fresh lemon flavor through the entire loaf.
Lemon extract
Just a small amount adds a second dimension of lemon flavor. It is light, balanced, and one of the reasons I prefer the recipe exactly as written.
Plain unsweetened yogurt
Yogurt gives the egg-free loaf moisture, body, and the substantial but tender crumb of an old-fashioned cake donut.
Cold butter
Cold cubed butter helps the streusel keep a mix of fine crumbs and large buttery clusters instead of disappearing into the batter.
Clear coarse sanding sugar
This adds the sparkly crunch that belongs on a donut loaf. Modern Mountain Baking Company White Sparkling Sugar is my go-to sanding sugar.
Brand notes
Brands that matter here
For the ingredients where brand choice changes texture, set, or flavor, these are the tested options I use.
Yogurt
Plain unsweetened yogurt
Plain unsweetened yogurt adds moisture, acidity, and body so the crumb bakes up tender without tasting tangy.
- 01Forager Unsweetened Plain Yogurt
- 02Silk Plain Unsweetened Yogurt
Milk
Milk
Milk affects how smoothly a batter, filling, or frosting comes together. Soy milk and Ripple tend to emulsify well because their protein and fat help create a creamy, cohesive finish.
- 01Silk Original Unsweet
- 02Plain unsweetened soy milk
- 03Ripple Original
- 04Oatly Barista Edition
Butter sticks
Butter sticks
Use butter sticks for buttercream and fillings that need to hold their shape.
- 01Country Crock Plant Butter Sticks
- 02Violife Plant Butter Sticks
- 03Earth Balance
- 04Miyoko's
Testing notes
Why this works
What gives this egg-free loaf structure
Yogurt, cornstarch, flour, and sugar work together to give the loaf a substantial cake-donut crumb that still stays tender.
Why room-temperature ingredients matter
Room-temperature yogurt and milk blend smoothly with the oil and help the batter bake evenly.
Why the streusel stays chilled
Cold butter helps the streusel hold onto a mix of fine crumbs and larger clusters instead of melting into the batter.
Why the zest is rubbed into the sugar
The friction releases the fragrant oils in the zest before the wet ingredients go in. The sugar should look lightly moistened and smell distinctly lemony.
Why the streusel is layered
Half of the streusel creates a buttery seam through the center, while the rest bakes into crisp clusters over the top.
Why the loaf bakes at 350°F
The steady oven temperature gives the center time to bake through while keeping the streusel from browning too quickly.
How to check for doneness
Look for a center at 205-210°F and a tester inserted into the cake portion that comes out with moist crumbs but no wet batter. Avoid testing directly through the streusel seam.
How it comes together
Small things that matter
Tips for the best loaf
Bring the yogurt and milk to room temperature so they blend smoothly with the oil and sugar.
Keep the streusel refrigerated until the batter is ready, and preserve plenty of large buttery clusters.
Spread just under half of the batter into the pan first so the upper cake layer has enough batter to cover the streusel seam.
Sprinkle the clear coarse sanding sugar generously before baking. I use a lot.
Check the streusel at 45 minutes and tent loosely with foil if it is browning quickly.
Let the loaf cool completely before glazing so the glaze stays thick enough to coat the streusel instead of melting into it.
Before you slice
Texture and serving notes
Serve at room temperature for the softest crumb and the fullest lemon flavor.
The lemon becomes even brighter after the loaf chills overnight, making this an especially good make-ahead recipe.
Keep it good
Storage
Fridge
Store covered in the refrigerator for up to 4 days.
Fridge
The flavors become even brighter after chilling overnight.
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 leave out the lemon extract?
Yes, but the lemon flavor will be a little different. If you leave it out, you can add slightly more fresh lemon juice to the glaze. I prefer the loaf as written because the extract adds a light, rounded layer of lemon flavor without overpowering the fresh zest and juice.
Can I make this a lemon poppy seed donut loaf?
Yes. Whisk 2 tablespoons of poppy seeds into the wet ingredients before adding the dry ingredients.
Can I use dairy ingredients?
Yes. I test this recipe with Forager Unsweetened Plain Yogurt, Silk Unsweetened Original Soymilk, and Country Crock Plant Butter Sticks. Dairy yogurt, milk, and butter can be used at the same listed amounts and temperatures.
What sanding sugar do you use?
I use a clear coarse sanding sugar and sprinkle it generously before baking. Modern Mountain Baking Company White Sparkling Sugar is my go-to.
How is this different from the Lemon Poppy Seed Donut Loaf?
This is a streusel-layered old-fashioned donut loaf with a lemon glaze and optional poppy seeds. The Lemon Poppy Seed Donut Loaf is a simpler one-bowl poppy seed loaf finished with vanilla glaze.
How do I know when the loaf is done?
The center should reach 205-210°F, and a tester inserted into the cake portion should come out with moist crumbs but no wet batter. Test beside the streusel seam rather than directly through it.
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.
Can I use Greek yogurt in this donut loaf?
I do not recommend it. Greek yogurt is much thicker and contains less moisture than the plain unsweetened yogurt used here, which can make the batter too thick and the finished loaf denser or drier. Use regular plain unsweetened yogurt for the texture this recipe was designed to have.
Can I substitute sour cream for the yogurt?
Yes, regular full-fat sour cream is the closest substitute. Replace the plain unsweetened yogurt with the same amount by weight. Sour cream is thicker and higher in fat, so the batter may be slightly thicker and the finished loaf a little richer and denser than the version I tested with yogurt. Avoid reduced-fat or fat-free sour cream, which can behave differently.
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