Cinnamon Donut Loaf

The smell of cinnamon has a way of pulling people into the kitchen before they even know what is being baked, and this loaf proved that to me one rainy Saturday when my neighbor knocked on my door asking what on earth I was making.

I brought this to a potluck brunch thinking it would be a simple addition, and it disappeared before the quiche even got touched.

Ingredients

• All-purpose flour (1 and 1/2 cups or 190g): Provides the sturdy yet tender structure this loaf needs to hold the swirl without collapsing.
• Granulated sugar (3/4 cup or 150g): Sweetens the batter just enough to let the cinnamon shine without overpowering it.
• Baking powder (2 tsp): Gives the loaf its gentle rise and that soft crumb everyone loves.
• Salt (1/2 tsp): A small amount that balances the sweetness and deepens the cinnamon flavor beautifully.
• Ground cinnamon (1 tsp for batter): Infuses the entire cake with warmth so every bite carries that donut shop aroma.
• Milk (1/2 cup or 120ml): Keeps the crumb moist and tender throughout.
• Large eggs (2): Bind everything together and add richness to the texture.
• Unsalted butter, melted (1/3 cup or 75g for batter): Melted butter creates a denser, more satisfying crumb that slices cleanly.
• Vanilla extract (1 tsp): Rounds out the spices and adds a soft background sweetness.
• Brown sugar (1/3 cup or 70g): Forms the gooey, caramel-like cinnamon layer in the middle.
• Ground cinnamon (1 tsp for the swirl layer): Combines with brown sugar to create the donut-inspired ribbon.
• Unsalted butter, melted (2 tbsp for topping): Brushed on while warm so the cinnamon sugar adheres and creates a crackly crust.
• Granulated sugar (1/4 cup or 50g for topping): That finishing touch of sweetness on top that mimics a freshly rolled donut.
• Ground cinnamon (1 tsp for topping): Completes the donut illusion with a fragrant, spiced crown.

Instructions

Prepare your pan and oven:

Preheat to 350 degrees Fahrenheit and line an 8 by 4 inch loaf pan with parchment paper, leaving some overhang for easy removal later.

Mix the dry ingredients:

In a large bowl, whisk together the flour, granulated sugar, baking powder, salt, and cinnamon until evenly distributed and lump free.

Combine the wet ingredients:

In a separate bowl, beat the milk, eggs, melted butter, and vanilla until smooth and fully incorporated.

Bring the batter together:

Pour the wet mixture into the dry and stir gently until just combined, stopping as soon as you no longer see dry flour streaks.

Make the cinnamon sugar swirl:

In a small bowl, stir the brown sugar and cinnamon together until uniform in color.

Layer and assemble:

Pour half the batter into your prepared pan, sprinkle the cinnamon sugar mixture evenly across the surface, then cover with the remaining batter and smooth the top.

Bake until golden:

Bake for 40 to 50 minutes, checking at the 40 minute mark with a toothpick that should come out clean from the center.

Cool and finish:

Let the loaf rest in the pan for 10 minutes, then transfer to a wire rack, brush with melted butter while still warm, and sprinkle generously with the cinnamon sugar topping.

Slice and serve:

Allow the loaf to cool completely before slicing so the swirl sets and each piece holds its beautiful shape.

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The moment my daughter walked in after school, dropped her backpack, and said the house smelled like a bakery was when I knew this recipe had earned a permanent spot in my collection.

When to Bake This Loaf

This recipe shines on lazy weekend mornings when you want something warm from the oven but do not feel like rolling out dough or deep frying anything.

Keeping It Fresh

Wrapped tightly in plastic or stored in an airtight container, this loaf stays beautifully moist for up to three days at room temperature.

Fun Ways to Switch It Up

I have tried a few variations over time and some of them became repeat requests in my house.

• Swap the cinnamon for pumpkin spice in autumn for a seasonal twist that feels right on a crisp evening.
• Serve warm slices alongside a scoop of vanilla ice cream for a dessert that surprises everyone.
• Toast leftover slices the next morning and spread with cream cheese for an unforgettable breakfast.

Pin it

Some recipes become traditions without you planning it, and this cinnamon donut loaf is one of those effortless wonders that brings warmth to any table. Share it with someone you love, or keep a slice all to yourself with a quiet cup of coffee.

Recipe FAQs

→ Can I use a different size loaf pan?

An 8x4-inch pan works best for this loaf. If using a 9x5-inch pan, reduce baking time by about 5–8 minutes and check for doneness early. A smaller pan may cause the batter to overflow.

→ How should I store the cinnamon donut loaf?

Wrap the cooled loaf tightly in plastic wrap or store in an airtight container at room temperature for up to 3 days. For longer storage, freeze individual slices wrapped in foil for up to 2 months.

→ Can I substitute the all-purpose flour with another flour?

You can replace all-purpose flour with a 1:1 gluten-free baking blend for a gluten-free version. Whole wheat flour can replace up to half the all-purpose flour, though the texture will be slightly denser.

→ Why did my cinnamon sugar layer sink to the bottom?

This can happen if the batter is too thin. Ensure you don't overmix, and make sure the melted butter has cooled slightly before combining. Pouring the batter in two stages and spreading the cinnamon sugar evenly helps it stay layered.

→ Can I make this loaf ahead of time?

Absolutely. This loaf tastes even better the next day as the cinnamon flavors develop. Bake it a day ahead, store tightly wrapped, and add the butter and cinnamon sugar topping just before serving for the freshest result.

→ What can I use instead of brown sugar in the swirl?

Coconut sugar works as a direct substitute for brown sugar. You can also use white sugar mixed with a teaspoon of molasses to mimic brown sugar's moisture and depth of flavor.