Small Cinnamon Swirl Bundt Cake (6-Cup Pan)

This small cinnamon swirl Bundt cake has a buttery vanilla crumb with cocoa-cinnamon ribbons running through every slice. It is baked in a 6-cup Bundt pan, so you get the pretty shape without ending up with a huge cake. A thin milk-chocolate drizzle finishes it without hiding the swirl.

Living in Croatia, “mramorni kuglof” aka marbled ring cake is a familiar cake to me, and I have eaten plenty of it over the years. This version keeps that simple marbled look, adds a warm cinnamon note, and makes a smaller cake that feels right for an everyday coffee break or a small gathering.

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Why You’ll Love It

• It fits a 6-cup Bundt pan: You get about eight generous slices instead of a large party-size cake.
• It starts with one batter: Divide it once, then flavor part of it with cocoa and cinnamon.
• The swirl stays visible: Matching the texture of both batters helps them marble instead of blending together.
• It looks special without fussy decorating: The chocolate drizzle takes a few minutes and leaves the Bundt shape on show.

The Mramorni Kuglof Connection

Mramorni kuglof is the name many of us in Croatia use for a marbled ring cake made with light and cocoa batters. It is usually simple, homey, and served in slices rather than covered with heavy frosting. That familiar idea is the starting point here.

Cinnamon joins the cocoa layer, and the smaller pan keeps the recipe practical for a regular week. If you’re firmly on team cinnamon, these soft cinnamon churro cookies with fluffy frosting should be next on your baking list.

Equipment You’ll Need

• 6-cup Bundt pan
• Stand mixer or hand mixer
• Kitchen scale or dry measuring cups
• Two mixing bowls and a flexible spatula
• Long wooden skewer

Pan size matters here. A standard 10- or 12-cup Bundt pan will make this cake look low and flat. If the capacity is not stamped on your pan, fill the clean pan with water to the rim, one measured cup at a time, then dry it completely before baking. Baking for more people? Try this rich chocolate Bundt cake, which makes 12 generous slices and has an extra-moist sour cream crumb.

Ingredient Notes

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• Butter: Use unsalted butter softened to a cool room temperature. It should dent when pressed but should not look greasy or melted.
• Sugar: Granulated sugar sweetens the vanilla batter, with 2 extra tablespoons for the cinnamon-cocoa swirl.
• Flour: All-purpose flour gives the cake its structure. Weigh it if you can for the most consistent crumb.
• Eggs and milk: Room-temperature ingredients blend into the butter mixture more smoothly and help the crumb bake evenly.
• Cocoa and cinnamon: Unsweetened cocoa gives the swirl its color. One tablespoon of cinnamon gives it a clear, warm flavor without overpowering the vanilla cake.
• Milk chocolate: Use chopped milk chocolate for a thin drizzle that sets as the cake sits. Dark chocolate works too if you prefer a less sweet finish.

Exact quantities are in the recipe card below.

How to Make a Small Cinnamon Swirl Bundt Cake

Prepare the Pan and Oven

Heat the oven to 350 degrees F (175 degrees C), or 320 degrees F (160 degrees C) fan. Coat every groove of a 6-cup Bundt pan with baking spray that contains flour. Do this just before you fill the pan.

Make the Vanilla Batter

Beat the softened butter and 1 cup [200 g] sugar for 3 to 4 minutes, until pale and fluffy. Scrape the bowl once or twice, then beat in the eggs one at a time and mix in the vanilla.

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In a separate bowl, whisk together the flour, baking powder, and salt. With the mixer on low speed, add one-third of the flour mixture to the butter mixture.

Add half of the milk, followed by another third of the flour mixture.

Add the remaining milk, then finish with the remaining flour mixture. Mix only until no dry flour is visible. Do not overmix.

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Make the Cinnamon-Cocoa Batter

Transfer about half of the batter to a clean bowl. Fold in the cocoa, 2 tablespoons sugar, and cinnamon. If this batter is noticeably thicker than the vanilla batter, fold in 1 teaspoon milk at a time until the textures are close.

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Layer and Swirl

Spoon alternating mounds of vanilla and cinnamon-cocoa batter into the pan. Run a skewer through the batter in one or two loose figure-eights. Stop while the two colors are still distinct.

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Bake and Release

Bake for 45 to 50 minutes. Test the thickest part of the cake with a long skewer; it should come out clean or with a few moist crumbs, not wet batter.

Let the cake rest in the pan for 10 minutes. Gently loosen the top edge if needed, place a rack over the pan, and invert in one confident motion. Let the cake cool completely.

Chocolate Drizzle

Melt the milk chocolate in short 20-second bursts, stirring well after each one. Drizzle it over the cooled cake and let it set before slicing. I kept this drizzle simple and pourable, but you can use a thicker chocolate ganache if you want a richer finish.

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How to Keep the Swirl Distinct

• Match the batter textures: Cocoa absorbs moisture, so add a teaspoon or two of milk if the dark batter becomes stiff.
• Layer in large spoonfuls: Tiny spoonfuls create many thin lines that can blur together.
• Swirl once or twice: More passes do not make a better pattern; they turn the whole cake brown.
• Keep the skewer away from the pan: Dragging it against the greased surface can make release more difficult.

Tips for a Moist Cake That Releases Cleanly

• Weigh the flour if you can. Too much flour is the fastest route to a dry Bundt cake.
• Use room-temperature ingredients. Cold eggs can make the butter mixture look curdled and heavy.
• Stop mixing as soon as the flour is incorporated. Extra mixing develops gluten and tightens the crumb.
• Coat the center tube and every groove. Bundt cakes stick in the places you cannot easily reach after baking.
• Give it 10 minutes before turning it out. The cake needs a short rest to set, but leaving it in the pan until cold can encourage sticking.

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Easy Variations

• Use dark chocolate for a less sweet drizzle.
• Skip the chocolate and dust the cooled cake with powdered sugar.
• Replace the 2 tablespoons of granulated sugar in the dark batter with light brown sugar for a slightly deeper flavor.
• Use an unsweetened, neutral plant milk in place of dairy milk. Oat or soy milk will blend into the batter more smoothly than a thin nut milk.

Serving Ideas

Serve a slice with coffee and this homemade cinnamon-vanilla creamer for a very good ten minutes of hiding from everyone.

Storage and Freezing

Store the cooled cake in an airtight container at room temperature for up to 3 days. The cut side dries first, so press a piece of parchment or plastic wrap against it before covering the cake.

To freeze, wrap individual slices well and place them in a freezer-safe container for up to 2 months. Thaw the slices at room temperature. For the neatest finish, freeze the cake before adding the chocolate drizzle and decorate after thawing.

FAQs

How do I know if my Bundt pan holds 6 cups?

Fill the empty pan with water using a 1-cup measure and count how many cups it holds to the rim. This is the pan’s total capacity, not the amount of batter you should add. Dry the pan completely before greasing it.

Can I bake this in a standard 10- or 12-cup Bundt pan?

You can, but the cake will be much shorter and may bake faster. The proportions and baking time in this recipe are designed for a 6-cup pan, so that is the best choice for the intended shape and crumb.

Why did my cinnamon batter become thick?

Cocoa absorbs moisture. Fold in milk 1 teaspoon at a time until the dark batter falls from the spatula about as easily as the vanilla batter. Similar textures create a cleaner swirl and more even crumb.

Why did my cake stick to the pan?

The most common causes are missed grooves, an uncoated center tube, or leaving the cake in the pan too long after baking. Coat the pan carefully and turn the cake out after a 10-minute rest.

Can I make it a day ahead?

Yes. Bake and cool the cake, then store it tightly covered at room temperature. Add the chocolate drizzle once the cake is fully cool. The cake slices cleanly the next day.

Can I leave out the cocoa?

Yes, but the marbled pattern will be pale. For a cinnamon-only swirl, mix the extra sugar and cinnamon into half of the batter and watch the texture; add a little milk only if that half becomes thicker.