Name: Fluffy Cinnamon Sugar Donut Cake Recipe
Prep time: 20 min
Cook time: 50 min
Total time: 1 h 10 min
Cuisine: American
Ingredients: 60g raw / turbinado sugar; 1/2 tsp cinnamon; 150g unsalted butter, at room temperature; 320g granulated sugar; 1 Tbsp vanilla extract or vanilla bean paste; 2 large eggs (about 110g, not including the shell), at room temperature; 165g sour cream, at room temperature; 250g all-purpose flour; 3/4 tsp baking powder; 1/2 tsp kosher salt (use less if you are using table salt or salted butter); 1/4 tsp cinnamon

Jump to Recipe· 4.1 from 3 reviews

If you’re craving a delightful treat that tastes just like a warm, cinnamon sugar-dusted donut but in cake form, then you are going to fall head over heels for this Fluffy Cinnamon Sugar Donut Cake Recipe. It’s a perfect marriage of tender crumb and sweet, spicy topping that brings out all the cozy flavors we associate with our favorite morning indulgence. This cake is fluffy, moist, and generously coated in cinnamon sugar, making every bite a little celebration of comfort and joy. Whether you’re serving it up for breakfast, a snack, or dessert, this recipe’s charm lies in its simplicity and that irresistible donut-inspired taste.

Ingredients You’ll Need

A top-down view of a metal bowl sitting on a white marbled surface, containing a thick, pale yellow batter mixed around the edges, with two bright orange raw egg yolks and translucent egg whites resting in the middle of the batter. The texture of the batter looks soft and creamy, and bits of batter cling to the sides of the bowl. photo taken with an iphone --ar 4:5 --v 7

This Fluffy Cinnamon Sugar Donut Cake Recipe calls for simple ingredients that are easy to find but play an essential role in creating its signature texture and flavor. Each one contributes something special, from the tangy richness of sour cream to the warm spice blend of cinnamon sugar.

Raw / turbinado sugar (60g): Adds a crunchy texture and deep caramel notes, especially important for the cinnamon sugar coating.
Cinnamon (3/4 tsp total): The star spice giving the cake its cozy, aromatic warmth.
Unsalted butter (150g), at room temperature: Creates moistness and tender crumb without adding saltiness, letting cinnamon and sugar shine.
Granulated sugar (320g): Sweetens the cake evenly while helping to achieve that light crumb.
Vanilla extract or paste (1 Tbsp): Enhances all other flavors and adds a touch of sweetness with its fragrant notes.
Large eggs (2): Provide structure and help the cake rise beautifully for that fluffy texture.
Sour cream (165g), at room temperature: Brings moisture and slight tang that balances the sweetness brilliantly.
All-purpose flour (250g): The foundation of the cake, creating its soft yet sturdy body.
Baking powder (3/4 tsp): Essential for leavening, contributing to that signature fluffiness.
Kosher salt (1/2 tsp): Enhances flavors and balances sweetness; adjust slightly if using table salt or salted butter.

How to Make Fluffy Cinnamon Sugar Donut Cake Recipe

Step 1: Prepare Your Pan and Cinnamon Sugar

Begin by preheating your oven to 330°F (165°C). Combine raw sugar and cinnamon in a small bowl—this will be your magical coating. Generously butter an 8-inch square pan and dust it thoroughly with the cinnamon sugar, assuring every inch is covered for maximum flavor and that iconic cinnamon crust. Pop the pan into the fridge to let the butter set, which helps keep that coating firmly in place when you pour in the batter.

Step 2: Cream the Butter, Sugar, and Vanilla

Using a stand mixer or electric mixer, beat the room temperature butter, granulated sugar, and vanilla on medium-high speed until very light, airy, and fluffy—about several minutes. This step is key: it incorporates air into the mixture so that your cake rises with a featherlight texture every time.

Step 3: Incorporate Eggs

Add your eggs one at a time, mixing thoroughly after each addition. Then, crank the mixer speed up for 2-3 more minutes to thicken and lighten the batter even further, making sure the eggs are fully integrated and the mixture becomes luscious and pale.

Step 4: Mix Dry Ingredients and Sour Cream

In a medium bowl, whisk together the flour, baking powder, salt, and cinnamon until evenly combined. In another small bowl, measure out the sour cream. Now, alternately add the flour mixture and sour cream to your butter mixture, starting and ending with the flour. Do this in three additions of flour and two of sour cream, mixing gently between each addition. Finish by folding with a spatula for an even, smooth batter without overmixing.

Step 5: Fill the Pan and Add Topping

Transfer the batter to your chilled, cinnamon sugar-dusted pan and smooth the surface with a spatula, pressing out large air bubbles to ensure an even bake. Sprinkle the leftover cinnamon sugar evenly over the top—this creates that classic donut sugar crust that’s so addictive.

Step 6: Bake to Perfection

Bake for 45 to 50 minutes, or until the cake springs back lightly when touched in the center and a skewer inserted comes out clean or with just a few moist crumbs. This gentle doneness ensures your cake remains fluffy yet moist.

Step 7: Cool and Serve

Allow the cake to cool completely in the pan for the best texture and easier slicing. When almost ready to enjoy, use a plastic knife or scraper to neatly cut the cake into portions. Trust me, this cake needs minimal fanfare because it shines all on its own.

How to Serve Fluffy Cinnamon Sugar Donut Cake Recipe

A close-up view of a single square piece of light golden yellow cake with a rough, slightly crispy top layer that is sprinkled with coarse sugar, sitting on crinkled white parchment paper on a white marbled surface. The cake looks soft and fluffy with small air holes inside. To the left, a small crumb has fallen off the cake piece. In the background, a rectangular metal cake pan with more pieces of the same cake is slightly out of focus, resting on the white marbled surface. On the right side behind the cake, there is an orange carrot slightly blurred, adding a touch of color contrast to the scene. The overall background is a clean, light setting that highlights the warm colors of the cake, photo taken with an iphone --ar 4:5 --v 7

Garnishes

This cake is already dazzling with its cinnamon sugar topping, but adding a few finishing touches can elevate your presentation. Consider a light dusting of powdered sugar or a drizzle of simple glaze made with powdered sugar and milk for an extra sweet kiss. Toasted nuts or a sprinkle of ground cinnamon can also add some pleasant texture and aroma.

Side Dishes

The beauty of this Fluffy Cinnamon Sugar Donut Cake Recipe is that it pairs wonderfully with so many accompaniments. A scoop of vanilla ice cream turns it into dessert heaven, while fresh fruit like raspberries or sliced apples adds bright contrast. For breakfast, a cup of piping hot coffee or spiced chai can perfectly complement the warm cinnamon notes.

Creative Ways to Present

Consider cutting the cake into bite-sized squares and serving them on dessert skewers layered with fruit or dollops of whipped cream. Alternatively, slice it into wedges and plate it alongside a creamy mascarpone spread for a sophisticated brunch offering. This versatile cake invites you to play with presentation, making it a showstopper at any gathering.

Make Ahead and Storage

Storing Leftovers

Keep your leftover Fluffy Cinnamon Sugar Donut Cake Recipe stored in an airtight container at room temperature, where it stays fresh for up to 4 days. Keeping the cake out of the fridge helps preserve its moist and fluffy texture, so it’s best enjoyed relatively soon after baking.

Freezing

If you want to keep the cake longer, freezing is a great option. Wrap individual slices tightly in plastic wrap and then place them in a freezer-safe bag or container. They will keep well for up to 2 months. When you’re ready to eat, thaw the slices in the refrigerator overnight or at room temperature for a few hours.

Reheating

To bring back that just-baked magic, a brief zap in the microwave works wonders. Heat slices for about 15-20 seconds to rewarm the cake and freshen up that soft, fluffy texture. You’ll find it almost as delightful as when it first came out of the oven!

FAQs

Can I use salted butter instead of unsalted?

Yes, but reduce the added salt slightly to avoid the cake tasting too salty. Using unsalted butter gives you better control over seasoning, but salted butter is an easy swap if that’s what you have.

Is sour cream necessary in this recipe?

Sour cream adds moisture and a gentle tang that balances the sweetness beautifully. If you don’t have sour cream, Greek yogurt is a solid substitute, but regular yogurt or crème fraîche might affect texture slightly.

Can I make this cake gluten-free?

While this recipe uses all-purpose flour, you can try a gluten-free flour blend designed for baking. Just be mindful of adjusting liquids and baking times, as gluten-free flours behave differently.

What is the best way to slice this cake?

A plastic knife or a cake scraper works best, especially if you’re using a non-stick pan. This prevents the cake from sticking and ensures clean, neat slices.

Can I add extra spices to the cinnamon sugar?

Absolutely! Adding a pinch of nutmeg or cardamom to the cinnamon sugar mix can give your cake an interesting twist and enhance its warm, cozy flavor profile.

Final Thoughts

This Fluffy Cinnamon Sugar Donut Cake Recipe is one of those rare treats that feels indulgent yet uncomplicated, perfect for sharing with friends or enjoying with your morning coffee in peace. It’s a recipe that brings the nostalgic joy of donuts without the fuss of frying, offering a soft, moist, cinnamon-sweet experience baked right into every slice. I encourage you to give it a try—you might just find your new favorite cake that can brighten any day effortlessly.