Cinnamon Donut Loaf

The smell of cinnamon donuts drifting through a bakery on a cold Saturday morning is something I have chased for years in my own kitchen, and this loaf is the closest I have ever gotten without a deep fryer. My apartment fills with that warm, toasted spice the moment it hits the oven, and honestly it ruins any plans of waiting until it cools to eat it. This recipe was born on a rainy afternoon when I had a craving but zero patience for frying.

I brought this to a friends potluck last fall and watched three people cut second slices before dinner even started, which told me everything I needed to know. One friend stood over the pan with a fork and asked if it was rude to claim the end piece right then and there. It was not rude, it was smart.

Ingredients

• 1 and 1/2 cups (190g) all-purpose flour: This forms the sturdy base of the loaf, and I have found that sifting it once makes the crumb noticeably softer.
• 3/4 cup (150g) granulated sugar: Just enough sweetness without tipping into cupcake territory.
• 2 tsp baking powder: Make sure yours is fresh, because old baking powder will leave you with a dense, sad loaf.
• 1/2 tsp salt: Salt is the quiet hero here, balancing the cinnamon and sugar so nothing tastes flat.
• 1 tsp ground cinnamon (batter): This background note of spice in the cake itself makes the swirl layer pop even more.
• 1/2 cup (120ml) milk: Whole milk gives the best texture, but any milk you have on hand works fine.
• 2 large eggs: They bind everything together and add richness, so grab the freshest ones you have.
• 1/3 cup (75g) unsalted butter, melted: Melted butter keeps the batter easy to stir and adds a tender crumb you cannot get from oil alone.
• 1 tsp vanilla extract: A good quality vanilla rounds out the warm spices beautifully.
• 1/3 cup (70g) brown sugar (swirl): Brown sugar in the middle layer creates that gooey, caramel like donut center.
• 1 tsp ground cinnamon (swirl): This is where the bold donut flavor lives, so do not skimp.
• 2 tbsp unsalted butter, melted (topping): Brushed on while the loaf is still warm so it soaks right in.
• 1/4 cup (50g) granulated sugar (topping): Creates that classic crunchy donut coating on top.
• 1 tsp ground cinnamon (topping): Mixed with the sugar for that unmistakable donut shop finish.

Instructions

Get your oven ready:

Preheat to 350 degrees F and line your loaf pan with parchment paper, leaving some overhang on the sides so you can lift the loaf out cleanly later.

Whisk the dry ingredients:

In a large bowl, whisk together the flour, sugar, baking powder, salt, and cinnamon until evenly combined 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.

Bring the batter together:

Pour the wet mixture into the dry and fold gently with a spatula just until you see no more dry flour, stopping before the batter gets tough.

Make the cinnamon sugar filling:

Stir the brown sugar and cinnamon together in a small bowl until evenly mixed.

Layer the loaf:

Pour half the batter into the pan, sprinkle the cinnamon sugar evenly across the surface, then top with the remaining batter and smooth it out gently.

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 warm, and sprinkle generously with the cinnamon sugar topping.

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The moment I brushed melted butter across that warm crust and watched the cinnamon sugar stick to it like snow on a rooftop, I knew this recipe was never leaving my rotation. It is the kind of bake that makes people close their eyes on the first bite.

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. I have also frozen slices individually in plastic wrap and they thaw perfectly for a quick breakfast treat on busy mornings.

Fun Ways to Switch It Up

Swap the cinnamon for pumpkin spice in the fall and you have an entirely different loaf that tastes like October in cake form. A handful of chopped pecans folded into the batter adds a satisfying crunch, and a cream cheese drizzle on top turns it into something worthy of a birthday brunch.

What to Serve Alongside It

A cup of strong coffee or chai tea is really all you need, but a scoop of vanilla bean ice cream transforms a simple slice into a proper dessert. Here are a few pairings I keep coming back to.

• Fresh fruit salad on the side balances the sweetness beautifully.
• A dollop of Greek yogurt makes it feel like an acceptable breakfast.
• Warm apple cider in autumn turns this into the coziest afternoon snack imaginable.

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This cinnamon donut loaf is the reason my kitchen smells like a bakery most weekends, and I hope it becomes that for you too. Share it with someone who needs a little warmth today.

Recipe Questions & Answers

→ 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 5–10 minutes and check for doneness early. The loaf will be slightly shorter but still delicious.

→ How do I know when the loaf is fully baked?

Insert a toothpick into the center of the loaf. It should come out clean with no wet batter clinging to it. The top should be golden brown and spring back lightly when touched. Baking typically takes 40–50 minutes at 350°F.

→ Can I make this loaf ahead of time?

Yes, this loaf stores well for up to 3 days when wrapped tightly at room temperature. You can also freeze individual slices wrapped in plastic wrap for up to 2 months. Thaw at room temperature before serving.

→ What can I substitute for the butter?

You can replace the melted butter with an equal amount of neutral oil like canola or vegetable oil. For a dairy-free version, use coconut oil or a plant-based butter alternative. Keep in mind the flavor and texture may vary slightly.

→ Why did my cinnamon sugar layer sink or disappear?

Make sure your batter is thick enough before layering. Spread half the batter, add the cinnamon sugar, then carefully spoon the remaining batter on top without mixing it into the layer. A thicker batter helps the swirl stay distinct during baking.

→ Can I add a glaze instead of the butter topping?

Absolutely. A simple powdered sugar and milk glaze drizzled over the cooled loaf works beautifully. You could also use a cream cheese glaze for extra richness. Apply glaze only after the loaf has cooled completely to prevent it from melting off.