Cinnamon Sugar Donut Bread

A buttery, tender quick bread swirled with cinnamon and coated in a crunchy cinnamon-sugar crust that tastes exactly like an old-fashioned cake donut.

Why This Recipe Works:

• Buttermilk Acidity: The lactic acid in buttermilk weakens gluten bonds, ensuring an incredibly tender, melt-in-your-mouth crumb.
• The Butter Barrier: Brushing the baked loaf with melted butter creates a lipid barrier that keeps the cinnamon-sugar coating crisp instead of soggy.
• Gentle Mixing: Folding the dry ingredients by hand prevents over-activation of the flour's proteins, mimicking the texture of a cake donut.

My first apartment had a radiator that hissed like an angry cat and a kitchen so small I could touch the fridge while standing at the stove. It was during a freezing November morning there that I tried to fry yeast donuts for the first time. I ended up splattering hot canola oil all over my favorite knit sweater and spent the afternoon crying over greasy, collapsed dough.

I needed a shortcut.

Most quick bread recipes that promise "donut flavor" end up tasting like a dry muffin masquerading in a loaf pan. The science behind this is simple: overmixing the batter overdevelops the gluten matrix, turning a tender crumb into a dense, rubbery sponge.

We use buttermilk to tenderize the crumb. Then, we brush the warm loaf with melted butter to help the sugar coating cling to the crust, a trick we also love using for our sweet cinnamon sugar biscuit bites.

Trust me on this one.

This recipe delivers all the nostalgic, spiced warmth of a bakery-style cake donut without a single drop of frying oil. It is hands down the easiest way to satisfy a weekend pastry craving, especially if you love the cozy vibes of a classic lemon coffee cake but want something even faster.

Cinnamon Sugar Donut Bread

• Publisher Storied Skillet
• Cuisine American
• Category Breakfast, Quick Bread
• Prep Time 15 minutes
• Cook Time 50 minutes
• Servings 8
• Calories 320 calories
• Rating 4.8 4252
• Tags Cinnamon Sugar Donut Bread, quick bread, cinnamon sugar, breakfast loaf, cake donut bread

Ingredients

• 2 cups (240g) all-purpose flour
• 1 cup (200g) granulated sugar
• 2 teaspoons baking powder
• 1/4 teaspoon baking soda
• 1 teaspoon Diamond Crystal kosher salt
• 1 1/2 teaspoons ground cinnamon
• 1/2 cup (113g) unsalted butter, melted and cooled slightly
• 2 large eggs, room temperature
• 1 cup (240ml) buttermilk, room temperature
• 1 teaspoon pure vanilla extract
• 1/3 cup (65g) granulated sugar (for the swirl)
• 1 1/2 teaspoons ground cinnamon (for the swirl)
• 1/4 cup (57g) unsalted butter, melted (for the topping)
• 1/3 cup (65g) granulated sugar (for the topping)
• 1 teaspoon ground cinnamon (for the topping)

Directions

1. Preheat your oven to 350°F (175°C). Grease an 8.5x4.5-inch loaf pan with nonstick spray or line it with parchment paper, leaving an overhang on the sides.
2. In a large bowl, whisk together the flour, sugar, baking powder, baking soda, salt, and cinnamon until no lumps remain.
3. In a separate medium bowl, whisk the melted butter, eggs, buttermilk, and vanilla extract until smooth.
4. Pour the wet ingredients into the dry ingredients. Use a rubber spatula to gently fold the mixture just until combined, making sure not to overmix.
5. In a small bowl, mix the swirl ingredients (sugar and cinnamon) together.
6. Pour half of the batter into the prepared loaf pan. Sprinkle the cinnamon-sugar swirl mixture evenly over the batter, then top with the remaining batter. Use a butter knife to gently swirl the layers together.
7. Bake for 48 to 52 minutes, or until a toothpick inserted into the center comes out clean. Let the bread cool in the pan for 10 minutes, then transfer it to a wire rack.
8. For the topping, melt the butter in a shallow dish. In another shallow dish, mix the sugar and cinnamon. Brush the warm loaf generously with melted butter on all sides, then press and roll the loaf in the cinnamon-sugar mixture until fully coated.

Notes

• Salt Conversion: We highly recommend using Diamond Crystal kosher salt. If you are using Morton's kosher salt or fine table salt, cut the volume in half (use 1/2 teaspoon instead of 1 teaspoon) to prevent an overly salty loaf.
• The Buttermilk Rule: Buttermilk is crucial here because its lactic acid breaks down the gluten strands in the flour. This chemical reaction ensures the bread mimics the tight, tender crumb of a traditional cake donut rather than a standard banana bread.
• Prevent Burning: Do not leave the bread in the oven past the 52-minute mark. Because of the high sugar content in the swirl, the edges can transition from perfectly caramelized to bitter and burnt very quickly; start checking with a toothpick at 45 minutes.
• Storage Behavior: After 24 hours in an airtight container, the crunchy sugar coating will naturally soften as it absorbs moisture from the bread. To restore that classic donut crunch, simply pop individual slices into a toaster oven for 2 minutes before serving.

Serving Suggestions

This bread is spectacular when served warm, but you can easily turn it into a showstopping breakfast spread with a few simple additions.

• Serve warm with a generous smear of salted butter.
• Pair with a hot cup of black coffee to balance the sweet cinnamon crust.
• Slice thick and use it as the base for an decadent French toast.
• Drizzle with a simple powdered sugar glaze for extra sweetness.
• Serve alongside fresh berries to add a bright, tart contrast.

Storage and Reheating

Storing this bread is a delicate balance of preserving moisture without turning the sugar crust into a sticky puddle. Keep the loaf at room temperature in a paper bag for the first 24 hours to let it breathe.

If you must use an airtight container, wrap the loaf loosely in a paper towel first. The paper towel acts as a sponge, absorbing excess moisture before it can dissolve your beautiful sugar coating.

Do not refrigerate this bread.

Bear with me here, because the physics of this is fascinating. The cold environment of a refrigerator accelerates starch recrystallization, which dries out the crumb and ruins the texture. For long-term storage, slice the loaf, wrap each slice in plastic wrap, and freeze them for up to three months.

Reheat frozen slices directly in a toaster oven at 350°F for five minutes. This revives the tender interior while crisping the cinnamon-sugar exterior back to perfection.

Ingredient Substitutes

If you find yourself missing an ingredient, these simple swaps will keep your baking project on track without sacrificing texture.

1. Buttermilk: If you don't have buttermilk, mix 1 cup of whole milk with 1 tablespoon of lemon juice or white vinegar, and let it sit for 5 minutes before using.
2. All-Purpose Flour: You can substitute a 1:1 gluten-free baking flour blend to make this gluten-free, though the crumb may be slightly more delicate.
3. Granulated Sugar: Light brown sugar can be used in the batter for a deeper, caramel-like flavor, but stick to granulated sugar for the exterior coating to get that authentic donut crunch.

I still think about that greasy apartment kitchen every time I pull this loaf out of the oven, but now I just laugh. There is something incredibly satisfying about outsmarting a recipe, skipping the messy oil, and getting perfect, sugary donut slices with nothing but a mixing bowl and a spatula.