Cinnamon Donut Loaf

The smell of cinnamon wafting through the kitchen on a lazy Saturday morning is enough to make anyone stumble out of bed, and this loaf captures that donut shop magic without the deep fryer. My neighbor once knocked on my door holding a plate of cinnamon donuts as a thank you for collecting her mail, and I spent the next week obsessed with recreating that flavor in a simpler form. This loaf was the result: a golden, tender crumb hugged by a crackling cinnamon sugar crust that crunches under your fingers before you even take a bite. It is everything good about a donut, folded into the ease of a quick bread.

I baked this for a brunch potluck last fall and watched three people circle back to the loaf pan for seconds before the coffee was even ready. There is something about the way the butter soaks into the warm crumb that makes it impossible to leave alone.

Ingredients

• 2 cups (250 g) all-purpose flour: The backbone of the loaf, and measuring by weight here really does save you from a dense, heavy crumb.
• 3/4 cup (150 g) granulated sugar: Just enough sweetness to let the cinnamon shine without turning this into a sugar bomb.
• 2 tsp baking powder: Gives the loaf its gentle rise so every slice feels fluffy rather than brick like.
• 1/2 tsp baking soda: Works with the milk to create an extra tender texture you can feel with every bite.
• 1/2 tsp salt: Do not skip this, because salt is the quiet hero that makes cinnamon taste more like itself.
• 1 tsp ground cinnamon (in the batter): Use fresh cinnamon if you can, because the dusty bottle from the back of the cupboard will not do this loaf justice.
• 2 large eggs: Bring everything together and add richness to the crumb.
• 3/4 cup (180 ml) whole milk: Whole milk matters here for moisture and tenderness, though you can sneak by with whatever is in the fridge.
• 1/2 cup (113 g) unsalted butter, melted and cooled: Let it cool so you do not scramble the eggs, which is a mistake I have absolutely made.
• 2 tsp pure vanilla extract: The warm background note that rounds out every spice and makes the whole kitchen smell incredible.
• 1/4 cup (56 g) unsalted butter, melted (for the topping): This is what makes the cinnamon sugar stick and creates that irresistible crust.
• 1/3 cup (65 g) granulated sugar (for the topping): The crunch factor, and you want it generously applied.
• 1 tsp ground cinnamon (for the topping): This is the donut moment, so be generous and use your best cinnamon here.

Instructions

Prepare the oven and pan:

Heat your oven to 350 degrees Fahrenheit and grease a 9 by 5 inch loaf pan before lining it with parchment, leaving a little overhang on the sides so you can lift the loaf out cleanly later.

Whisk the dry ingredients:

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

Combine the wet ingredients:

In a separate bowl, whisk the eggs, milk, melted and cooled butter, and vanilla extract until the mixture looks smooth and slightly glossy.

Bring it all together:

Pour the wet mixture into the dry ingredients and stir gently with a spatula just until you no longer see dry flour streaks, because overmixing is the fastest path to a rubbery loaf.

Fill the pan and bake:

Scrape the batter into your prepared pan, smooth the top with your spatula, and bake for 40 to 45 minutes until a toothpick poked into the center slides out clean.

Cool briefly:

Let the loaf sit in the pan for 10 minutes so it can gather itself together, then use the parchment overhang to lift it onto a wire rack.

Apply the donut crust:

While the loaf is still warm, brush the top and sides generously with melted butter, then press the cinnamon sugar mixture all over the surface until every side is coated in that crunchy, sparkly layer.

Let it rest before slicing:

Allow the loaf to cool completely so the crumb sets properly and the topping has time to form its signature crackle.

Save

I once wrapped a leftover slice in parchment and tucked it into my bag for a hike, and it held up beautifully, crumbling just enough to feel indulgent without making a mess.

Fun Twists to Try

Fold half a cup of mini chocolate chips into the batter if you want to lean into dessert territory, or swap half the vanilla for almond extract to give the loaf a warmer, more complex personality.

What to Serve It With

This loaf and a mug of strong coffee were practically made for each other, though a spiced chai or even a cold glass of milk will do right by a thick slice.

Storing Your Loaf

Keep it wrapped tightly at room temperature for up to three days, though in my experience it rarely lasts that long once other people discover it is there.

• A slice toasted the next morning with a smear of butter is almost better than day one.
• You can freeze individual slices wrapped in foil for up to a month if you want to ration the magic.
• Always let the loaf cool completely before wrapping or the cinnamon sugar crust will soften into sadness.

Save

This cinnamon donut loaf is the kind of recipe that earns a permanent spot in your rotation, showing up for brunches, bake sales, and quiet mornings when you just want something warm and sweet. Bake it once and watch it disappear.

Common Recipe Questions

→ Can I use a different size loaf pan?

A 9x5-inch pan is ideal for this loaf. If using an 8x4-inch pan, the batter will fill it higher—extend baking time by 5 to 10 minutes and tent with foil if the top browns too quickly.

→ How should I store the cinnamon donut loaf?

Wrap the cooled 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 wrapped in foil for up to 2 months.

→ Can I make this loaf dairy-free?

Yes, substitute the whole milk with an equal amount of oat milk or almond milk, and replace the unsalted butter with a vegan butter stick. The texture will be slightly different but still delicious.

→ Why did my loaf turn out dense?

Overmixing the batter is the most common cause. Stir the wet and dry ingredients together just until combined—a few lumps are perfectly fine. Too much mixing develops gluten and creates a heavy, dense crumb.

→ Can I add mix-ins to the batter?

Absolutely. Fold in up to half a cup of mini chocolate chips, chopped pecans, or raisins after combining the wet and dry ingredients. Add them gently to avoid overmixing the batter.

→ When should I apply the cinnamon-sugar topping?

Brush the loaf with melted butter and apply the cinnamon-sugar mixture while it is still warm, about 10 minutes out of the oven. The warmth helps the butter absorb and the sugar adhere evenly to the crust.