Cinnamon Donut Loaf

The smell of cinnamon hitting a hot oven has a way of pulling people into the kitchen before anything is even done baking. My neighbor once knocked on my door holding a cup of coffee, asking what was making the whole hallway smell like a bakery. That was the afternoon this cinnamon donut loaf earned its permanent spot in my recipe rotation.

I brought this loaf to a potluck brunch and watched three people cut second slices before the coffee was even brewed. There is something about that golden crust and soft interior that makes people close their eyes on the first bite.

Ingredients

• All-purpose flour (1 1/2 cups, 190g): The backbone of the loaf, giving it that familiar cake doughnut texture without being too dense.
• Granulated sugar (3/4 cup, 150g): Keeps the loaf sweet but not cloying, balancing the bold cinnamon throughout.
• Baking powder (2 tsp): Gives the loaf its gentle rise so it stays tender and sliceable.
• Salt (1/2 tsp): A small amount that sharpens every flavor and keeps the sweetness grounded.
• Ground cinnamon (1 tsp in batter): Infuses the entire loaf with warm spice, not just the swirl.
• Milk (1/2 cup, 120ml): Adds moisture and helps create that soft, cakey crumb.
• Large eggs (2): Bind everything together and contribute to a rich, satisfying texture.
• Unsalted butter, melted (1/3 cup, 75g in batter): Melted butter gives the loaf a donut shop richness without needing to cream anything.
• Vanilla extract (1 tsp): Rounds out the cinnamon and adds a gentle warmth behind every bite.
• Brown sugar (1/3 cup, 70g, for swirl): Creates that molasses depth in the middle layer that granulated sugar alone cannot achieve.
• Ground cinnamon (1 tsp, for swirl): Doubled down in the center for an unmistakable donut shop hit.
• Unsalted butter, melted (2 tbsp, for topping): Brushed on warm so the cinnamon sugar sticks and forms a delicate crust.
• Granulated sugar (1/4 cup, 50g, for topping): Combines with butter and cinnamon to mimic that classic donut coating.
• Ground cinnamon (1 tsp, for topping): The final dusting that locks in the donut illusion from the outside in.

Instructions

Get the oven ready:

Preheat to 350 degrees F (175 degrees C) and grease an 8x4 inch loaf pan, then line it with parchment so the loaf lifts out cleanly.

Build the dry mix:

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

Combine the wet ingredients:

In a separate bowl, beat the milk, eggs, melted butter, and vanilla until smooth and slightly frothy on the edges.

Bring it all together:

Pour the wet into the dry and fold gently with a spatula just until no dry streaks remain, stopping before the batter gets tough.

Make the cinnamon swirl:

Stir the brown sugar and cinnamon together in a small bowl, breaking up any clumps with your fingers for an even layer.

Layer the loaf:

Pour half the batter into the pan, sprinkle the cinnamon sugar 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, transfer to a wire rack, brush with melted butter while warm, and sprinkle generously with the cinnamon sugar topping.

Slice and serve:

Allow the loaf to cool completely so the swirl sets and each slice holds its shape beautifully.

Save

The first time I served this to my family, my sister called it a cinnamon roll in disguise and immediately asked for the recipe. Moments like that remind me why I keep coming back to simple, honest baked goods.

Storing and Making It Last

This loaf stays wonderfully moist for up to three days when wrapped tightly in foil or stored in an airtight container at room temperature. The cinnamon sugar topping softens over time, but a quick toast in a warm oven brings back that just baked crunch beautifully.

Fun Variations to Try

Swapping the cinnamon for pumpkin spice in autumn turns this into something that pairs perfectly with a hot cider on a chilly afternoon. A handful of chopped pecans folded into the batter adds a nutty crunch that makes each slice feel more like a coffeehouse treat.

Serving Suggestions

A warm slice with a scoop of vanilla ice cream melting over the top is pure comfort on a plate. Cold from the fridge with morning coffee is equally satisfying in a quieter way.

• A dollop of whipped cream and a dusting of extra cinnamon makes it dinner party worthy.
• Pair it with a chai latte for an afternoon break that feels like a small celebration.
• Always let it cool completely before wrapping or the trapped steam will make the topping soggy.

Save

This cinnamon donut loaf is proof that the simplest recipes often leave the biggest impression. Bake it once and it will become one of those reliable favorites you reach for without even thinking.

Recipe FAQs

→ Can I use a different size loaf pan?

An 8x4-inch loaf pan works best for this bake. If using a 9x5-inch pan, reduce the baking time by about 5 to 10 minutes and check for doneness early, as the loaf will be shorter and bake faster.

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

This can happen if the batter is too thin. Make sure you measure the flour accurately using the spoon-and-level method. Also, ensure the batter is poured in two layers with the cinnamon sugar sandwiched in between, not mixed in.

→ How should I store this loaf?

Wrap the cooled loaf tightly in plastic wrap or store in an airtight container at room temperature for up to 3 days. You can also freeze individual slices wrapped well for up to 2 months.

→ Can I make this loaf dairy-free?

Yes, substitute the milk with your preferred plant-based milk and use a dairy-free butter alternative for both the batter and the topping. The texture will be slightly different but still delicious.

→ What does the toothpick test look like when it's done?

Insert a toothpick into the center of the loaf. It should come out clean or with just a few moist crumbs clinging to it. If there is wet batter on the toothpick, bake for another 5 minutes and test again.

→ Can I add nuts or other mix-ins?

Chopped pecans or walnuts make a great addition. Stir about half a cup into the batter before pouring it into the pan, or sprinkle some into the cinnamon sugar layer for added crunch.