Cinnamon Swirl Bundt Cake

The moment this cinnamon swirl Bundt cake comes out of the oven, the whole kitchen smells like warm vanilla and sweet cinnamon—cozy, but not heavy. The crumb is tender from buttermilk, and the swirl bakes into little pockets of cinnamon-sugar that make each slice more interesting than a plain butter cake.

If you love cinnamon-roll flavor but want something more hands-off than kneading dough, this is the bake. And for the nights you want that same vibe in minutes instead of an hour, I keep a quick fix bookmarked: microwave cinnamon roll mug cake.

Why You’ll Love This Recipe

• The buttermilk makes the cake soft and plush, with a gentle tang that keeps the sweetness from feeling flat.
• Cinnamon is mixed into the batter and layered as a swirl, so the flavor doesn’t disappear once it bakes.
• The batter comes together in a simple “wet + dry” rhythm—no fussy steps, just don’t overmix at the end.
• A Bundt pan gives you that bakery-style shape with minimal decorating required.
• It slices cleanly once cooled, with a swirl that shows up in every piece.

The Story Behind This Recipe

I developed this one for days when I want a cinnamon-forward bake that looks special on a plate but doesn’t require frosting or a mixer marathon—soft butter, sugar, eggs, and buttermilk do most of the work, and that mid-batter cinnamon-sugar layer delivers the “swirl” payoff without extra components.

What It Tastes Like

It’s sweet but not sticky-sweet, with a clear cinnamon warmth and a buttery vanilla aroma. The crumb is tender and springy (thanks to the buttermilk and the baking powder/baking soda combo), and the swirl creates little streaks of deeper caramel-cinnamon flavor throughout—especially near the outer edges where Bundt cakes brown beautifully.

Ingredients You’ll Need

This is a classic pantry-and-fridge cake: flour for structure, softened butter for richness, and buttermilk for tenderness and a subtle tang. The key is using truly softened (not melted) butter so it creams smoothly with the sugar, plus a full teaspoon of cinnamon in the batter so it reads like “cinnamon cake,” not just “vanilla cake with a hint.”

• 2 cups all-purpose flour
• 1 ½ teaspoons baking powder
• 1 teaspoon baking soda
• 1 cup sugar
• 1 teaspoon ground cinnamon
• ½ teaspoon salt
• ½ cup unsalted butter, softened
• 3 large eggs
• 1 teaspoon vanilla extract
• 1 cup buttermilk

How to Make Cinnamon Swirl Bundt Cake

1. Heat the oven and prep the pan. Set your oven to 350°F (175°C). Grease a Bundt pan thoroughly, making sure you get into every ridge—this cake bakes up tender, so a well-greased pan is your best insurance.
2. Whisk the dry ingredients. In a large bowl, whisk together the flour, baking powder, baking soda, cinnamon, and salt until the cinnamon looks evenly distributed (no dark streaks).
3. Cream the butter and sugar. In a separate bowl, beat the softened butter and sugar until creamy and noticeably lighter in color. You’re looking for a fluffy, spreadable texture—not greasy or melted.
4. Add eggs and vanilla. Mix in the eggs one at a time, letting each one blend in before adding the next. Stir in the vanilla extract; the batter should look smooth and glossy.
5. Alternate dry and buttermilk. Add the flour mixture and buttermilk in alternating additions, mixing gently just until you don’t see dry flour. The batter will be thick and creamy—stop as soon as it comes together to keep the cake tender.
6. Layer for the swirl. Spoon half the batter into the prepared pan and spread it lightly so it’s fairly even. Sprinkle with cinnamon-sugar (enough to cover in a light, even layer), then spoon the remaining batter on top and smooth gently. Don’t aggressively swirl with a knife here—you want a clear layer that bakes into a defined ribbon.
7. Bake. Bake for 50–60 minutes, until the top looks set and a toothpick inserted comes out clean. If you see a few moist crumbs, give it a few more minutes; wet batter on the toothpick means it needs more time.
8. Cool before flipping. Let the cake cool in the pan before inverting onto a plate. It should feel warm, not hot—cooling helps the crumb set so it unmolds cleanly.

Tips for Best Results

• Really grease the Bundt pan. Get into every crevice—those ridges are where cakes love to cling.
• Stop mixing as soon as the flour disappears. Overmixing after adding flour can make the crumb tight instead of tender.
• Watch the color cues near the end. The edges should look deeper golden-brown, and the top should spring back lightly when touched.
• Cool in the pan long enough to set. If you flip too early, the cake can tear; if you wait too long, it can stick—aim for warm and set.
• If you’re craving more cinnamon-roll energy in a different format, cinnamon roll cookies are great when you want a smaller, snacky bake.

Variations and Substitutions

• Bump the cinnamon: If you like a stronger spice note, increase the ground cinnamon slightly; it will read warmer and more fragrant without changing the texture.
• Vanilla-forward: Add a touch more vanilla extract for a rounder “bakery cake” aroma (it won’t affect structure).
• Buttermilk note: If your buttermilk is very tangy, that’s a good thing here—it brightens the sweetness and keeps the crumb from tasting flat. For another tangy-and-cozy cinnamon idea, try a cinnamon roll in a mug when you want something quick and single-serve.

How to Serve It

I love serving thick slices slightly warm so the cinnamon smells extra bold. It’s lovely on its own, but it also plays well with simple, not-too-sweet sides—especially something fruity. If you want an easy, cinnamon-friendly pairing that doesn’t compete with the cake, spoon some healthy cinnamon apples alongside each slice.

How to Store It

Let the cake cool completely before storing so you don’t trap steam (which can make the exterior sticky). Keep it covered at room temperature for a couple of days for best texture; after that, refrigerate it well-covered to keep it fresh longer. If you chill it, let slices sit at room temperature for a bit before eating so the crumb softens back up.

Final Thoughts

This cinnamon swirl Bundt cake is all about that tender buttermilk crumb and the cinnamon-sugar ribbon running through it—simple ingredients, clear steps, and a really satisfying slice. If you bake it, let it cool enough to unmold cleanly, then cut a generous piece and enjoy the swirl you worked in.

Conclusion

If you want to compare this style to a classic coffee-cake take, you might enjoy reading Allrecipes’ cinnamon swirl Bundt coffee cake. For a more cinnamon-roll-inspired Bundt with extra bakery flair, take a look at Sprinkle Bakes’ cinnamon roll Bundt cake. And if you’re curious about a richer, pound-cake-leaning version, Grandbaby Cakes’ famous cinnamon roll Bundt cake is a fun reference point.