Cinnamon Donut Loaf

The smell of cinnamon sugar hit me before I even opened the oven door. I'd been trying to recreate my favorite bakery cinnamon donuts without the mess of deep frying, and this loaf was my breakthrough moment.

My roommate wandered into the kitchen that morning and asked if I'd been to the donut shop. When I told her it was a loaf cake, she stood there watching the oven like she was waiting for something magical to happen.

Ingredients

• All-purpose flour (190g): Forms the tender crumb structure without becoming dense or dry, perfect for that cake-like donut texture
• Granulated sugar (150g): Sweetens the batter just enough to let the cinnamon shine without overpowering
• Baking powder (2 tsp): Gives the loaf its lift, creating those airy pockets that make it feel light and indulgent
• Salt (½ tsp): Balances the sweetness and wakes up all the warm spices
• Ground cinnamon (1 tsp): The backbone of flavor that fills the whole kitchen with that cozy, baking smell
• Milk (120ml): Adds moisture and richness to create a tender crumb that doesn't crumble
• Large eggs (2): Bind everything together and contribute to the structure and softness
• Unsalted butter, melted (75g): Infuses the batter with buttery flavor and keeps the texture velvety
• Vanilla extract (1 tsp): Rounds out all the flavors with that classic sweetness we all recognize
• Brown sugar (70g): Melts into the cinnamon layer creating those gooey, caramel-like ribbons throughout the loaf
• Ground cinnamon (1 tsp): Pairs with the brown sugar to form that signature cinnamon sugar swirl
• Unsalted butter, melted (2 tbsp): brushed on warm helps the final cinnamon sugar coating stick and creates that signature donut-shop finish
• Granulated sugar (50g): Forms the crunchy, sugary topping that makes this feel just like a classic cinnamon donut
• Ground cinnamon (1 tsp): Dusts the top for that final hit of warm spice and beautiful presentation

Instructions

Preheat and prep your pan:

Get your oven to 350°F (175°C) and line an 8x4-inch loaf pan with parchment paper so nothing sticks and you can lift the loaf out easily later.

Whisk together the dry ingredients:

In a large bowl, combine the flour, sugar, baking powder, salt, and cinnamon until everything is evenly distributed.

Mix the wet ingredients:

In another bowl, beat the milk, eggs, melted butter, and vanilla extract until the mixture is smooth and uniform.

Combine the batter:

Pour the wet ingredients into the dry ones and stir gently until just combined, being careful not to overmix or the loaf will become tough.

Make the cinnamon sugar layer:

In a small bowl, mix the brown sugar and cinnamon until they're fully incorporated and ready to create that signature swirl.

Layer it all up:

Spread half the batter in your prepared pan, sprinkle evenly with the cinnamon sugar mixture, then top with the remaining batter and smooth the surface.

Bake until golden:

Slide the pan into the oven for 40 to 50 minutes, checking for doneness when a toothpick inserted in the center comes out clean.

Brush and coat while warm:

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

Cool completely before slicing:

Let the loaf finish cooling so it sets properly and slices cleanly into those beautiful swirled pieces.

Save to Pinterest

That first warm slice, with butter still melting into the sugar on top, made the whole apartment smell like Saturday mornings. It became the thing friends started requesting for birthdays and casual coffee dates.

Making It Your Own

Swapping the cinnamon for pumpkin spice transforms this into autumn comfort food, and I've even added a handful of chopped pecans to the cinnamon sugar layer for extra crunch.

Storage Secrets

This loaf actually tastes better on day two when the flavors have melded. Wrap it tightly at room temperature and it stays perfect for three days, though it rarely lasts that long.

Serving Ideas

Warm slices with vanilla ice cream turn this into dessert, but my favorite way is still slightly toasted with butter for breakfast. The contrast between the warm, cinnamon-swirled center and the crunchy sugar topping is just right.

• Try serving with coffee or hot chocolate for the ultimate cozy treat
• Reheat individual slices for 15 seconds in the microwave to bring back that fresh-baked texture
• Slice it thick and grill it in butter for something completely unexpected

Save to Pinterest

Every time I pull this from the oven, I'm reminded that the best recipes are often the ones that bring people together without any fuss.

Your Questions Answered

→ 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 with a toothpick.

→ Why did my loaf sink in the middle?

Sinking usually happens when the oven is opened too early or the batter is overmixed. Keep the oven door closed for the first 35 minutes and stir the batter until just combined.

→ Can I substitute the butter with oil?

Yes, neutral vegetable oil can replace the melted butter in the batter in equal amounts. The texture will be slightly softer and the flavor a bit less rich.

→ How should I store leftover slices?

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

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

A simple powdered sugar and milk glaze works beautifully drizzled over the cooled loaf. Use about ½ cup powdered sugar mixed with 1–2 tablespoons of milk until smooth.

→ What does the cinnamon sugar layer do?

The brown sugar and cinnamon layer creates a concentrated swirl of warmth and sweetness through the center, giving each slice that unmistakable donut-shop flavor and a slightly chewy texture.