If you love the cozy flavor of old-fashioned cinnamon sugar donuts, this buttery cinnamon swirl donut loaf is about to become your new favorite homemade treat. It combines the rich flavor of a classic cake donut with the convenience of a soft baked loaf. Every slice is filled with warm cinnamon spice, buttery vanilla notes, and a sweet ribbon of cinnamon sugar running through the center. Finished with a crunchy cinnamon sugar crust, this loaf is perfect for breakfast, brunch, dessert, or an afternoon coffee break.

Why You’ll Love This Recipe

This donut loaf is incredibly soft, rich, and full of warm bakery-style flavor. Instead of frying donuts individually, everything is baked into one simple loaf that slices beautifully and stays moist for days. The cinnamon swirl adds extra sweetness throughout the loaf while the crunchy sugar topping creates the perfect contrast in texture.

You’ll also love how easy this recipe is to prepare with basic pantry ingredients. The hint of nutmeg gives the loaf that classic donut-shop taste, making every bite nostalgic and comforting. Whether served warm with coffee or enjoyed as a quick breakfast, this recipe delivers delicious results every time.

Ingredients

(Tip: You’ll find the full list of ingredients and measurements in the recipe card below.)

For the donut loaf batter:

2 cups all-purpose flour

1½ teaspoons baking powder

½ teaspoon fine salt

1 teaspoon ground cinnamon

½ teaspoon ground nutmeg

1 cup granulated sugar

½ cup unsalted butter, melted and slightly cooled

2 large eggs, room temperature

1 cup whole milk, room temperature

1 teaspoon pure vanilla extract

For the cinnamon swirl:

⅓ cup granulated sugar

1 tablespoon ground cinnamon

1 tablespoon melted butter

For the crunchy topping:

¼ cup granulated sugar

½ teaspoon ground cinnamon

1 tablespoon melted butter for brushing

Optional pinch of nutmeg

Directions

Preheat your oven to 350°F (175°C). Grease a 9×5-inch loaf pan and line it with parchment paper for easier removal.

In a medium mixing bowl, whisk together the flour, baking powder, salt, cinnamon, and nutmeg until evenly combined.

In a separate large bowl, whisk together the granulated sugar, melted butter, eggs, milk, and vanilla extract. Mix until smooth and creamy.

Gradually add the dry ingredients into the wet ingredients. Stir gently until just combined. Avoid overmixing the batter to keep the loaf soft and tender.

In a small bowl, prepare the cinnamon swirl by mixing the sugar, cinnamon, and melted butter until the mixture resembles damp sand.

Pour half of the batter into the prepared loaf pan. Sprinkle half of the cinnamon swirl mixture evenly over the batter. Add the remaining batter on top, then finish with the remaining cinnamon swirl mixture. Use a knife to gently swirl through the layers to create ribbons of cinnamon throughout the loaf.

Bake for 50 to 60 minutes or until a toothpick inserted into the center comes out clean. If the top browns too quickly, loosely cover it with foil during the final baking time.

Allow the loaf to cool for about 10 to 15 minutes before removing it from the pan.

While the loaf is still slightly warm, brush the top with melted butter. Mix the sugar and cinnamon for the topping, then sprinkle generously over the loaf. Gently press the topping so it sticks and forms a delicate crunchy crust as it cools.

Servings and timing

This recipe makes approximately 10 to 12 slices.

Prep Time: 15 minutes

Cook Time: 55 minutes

Total Time: About 1 hour 10 minutes

Variations

For extra richness, add a light vanilla glaze over the cooled loaf.

You can mix chopped toasted pecans or walnuts into the batter for added crunch.

For a sweeter dessert version, stir mini chocolate chips into the batter before baking.

If you enjoy stronger spice flavors, increase the cinnamon slightly or add a pinch of cloves.

You can also substitute part of the milk with buttermilk for a slightly tangy flavor and softer texture.

Storage/Reheating

Store the loaf in an airtight container at room temperature for up to 3 days. For longer storage, refrigerate it for up to 5 days.

To freeze, wrap individual slices tightly in plastic wrap and place them in a freezer-safe container for up to 2 months.

For reheating, warm slices in the microwave for about 10 to 15 seconds to restore the soft buttery texture. You can also heat slices in the oven at low temperature for a few minutes.

FAQs

Can I make this loaf ahead of time?

Yes, this loaf tastes great the next day and stays moist for several days.

Why does nutmeg make it taste like a donut?

Nutmeg is commonly used in classic cake donuts and gives the loaf its nostalgic bakery flavor.

Can I use salted butter?

Yes, but slightly reduce the added salt in the recipe.

How do I know when the loaf is done baking?

Insert a toothpick into the center. If it comes out clean, the loaf is ready.

Can I freeze the loaf?

Yes, wrap slices individually and freeze for up to 2 months.

What type of milk works best?

Whole milk gives the richest and softest texture, but other milk options can work too.

Can I add nuts or raisins?

Absolutely. Chopped nuts or raisins make delicious additions.

Why should I avoid overmixing the batter?

Overmixing can make the loaf dense and tough instead of soft and tender.

Can I turn this recipe into muffins?

Yes, the batter works well for muffins. Reduce the baking time to about 18 to 22 minutes.

What pairs well with this loaf?

Coffee, chai tea, hot milk, or fresh berries pair perfectly with the warm cinnamon flavor.

Conclusion

This buttery cinnamon swirl donut loaf with crunchy sugar crust delivers all the comforting flavor of an old-fashioned cinnamon sugar donut in an easy homemade loaf form. With its soft buttery crumb, warm spice blend, sweet cinnamon swirl, and crisp sugary topping, every slice feels bakery-quality. Whether you serve it for breakfast, brunch, or dessert, this cozy loaf is guaranteed to become a family favorite.

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