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This easy marble loaf cake recipe gives you the best of both worlds! You’ve got rich chocolate and soft vanilla cake swirled into one ultra-moist, bakery-style loaf topped with a smooth chocolate ganache. It’s simple to make, beautifully marbled, and the buttery soft!
For more delicious cake recipes, make my triple chocolate cake and cream cheese pound cake!
This marble loaf cake is one of those recipes you’ll make once and then keep coming back to.
It’s soft, moist, and perfectly marbled with moist chocolate and soft vanilla cake in every bite!
It’s easy enough for a casual bake but pretty enough to serve to guests. Basically, this is the loaf you leave on the counter and keep slicing all day long.
It’s simple, straightforward, and totally approachable. Low effort, high reward – my favorite kind of recipe!
Table of Contents
Why You’ll Love This Recipe
- Beautiful bakery-style swirls! The vanilla and chocolate batters swirl together effortlessly, giving you that classic marble look without complicated steps or special tools.
- Easy, no-fuss recipe! Simple ingredients, minimal prep, and no stand mixer required. It’s the kind of loaf cake you can throw together on a weeknight but pretty enough to serve at a dinner party!
- Two flavors in one loaf! You get rich moist chocolate cake and soft vanilla cake in every slice, so there’s no choosing sides. It’s the perfect balance of flavors when you can’t pick just one!
Key Ingredients
(full list of ingredients can be found in the recipe card below)
- Vegetable Oil keeps the marble cake ultra-moist and tender for days. Oil stays liquid at room temperature, which means a softer crumb than butter-only cakes and better moisture retention. This is especially important when you’re swirling batters.
- Dutch Process Cocoa Powder adds deep chocolate flavor and rich color to the chocolate swirl. Because it’s alkalized, it’s less acidic and smoother in taste, helping the chocolate batter blend seamlessly into the vanilla batter. Use leftovers and make my chocolate espresso cake next!
- Sugar sweetens the cake while also tenderizing the crumb by slowing gluten formation.
- Whole Milk adds moisture and richness! The fat in whole milk contributes to a softer crumb. I do this with my cranberry orange loaf cake too, it’s so good.
- Eggs provide structure, richness, and emulsification. Eggs bind the batter, trap air for lift, and help the vanilla and chocolate batters stay cohesive so the marble pattern bakes up evenly, not muddy or streaky.
How To Make Marbled Loaf Cake
Prep: Preheat the oven to 350 degrees F. Spray a 9×5 inch loaf pan with nonstick baking spray. Line with parchment paper so that there’s about 2 inches overhang on both longs sides. (this makes it easier to remove from the pan)
Step 1: In a large bowl, combine sugar, vegetable oil, vanilla extract, sour cream, and whole milk. Whisk together for about 1 minute, until everything is combined and smooth, then add in the eggs and continue to mix until combined, about 1 minute.
Step 2: Add in the dry ingredients to the wet ingredients – all purpose flour, kosher salt, baking powder, and baking soda. Mix until smooth and there are no patches of flour, about 30 seconds.
Step 3: Pour 1/2 of the batter (about 1 1/2 cups, 360g) into a separate bowl. Add the cocoa powder, espresso, and hot coffee. Whisk together until smooth.
Step 4: Both batters will be rather runny, this is how it’s supposed to be! Pour about a 1/2 cup of the vanilla cake batter into the loaf, then begin pouring a little of the chocolate cake batter on top of the yellow cake batter. Repeat this process, alternating until both batters are gone. Take a long wooden skewer or butter knife and swirl the batter gently. Bake in the preheated oven for 50-60 minutes, until a wooden skewer inserted into the center of the cake comes out with just a few moist crumbs.
Step 6: When the loaf has cooled completely, prepare the chocolate ganache topping by adding heavy cream to microwave safe bowl. Warm for one minute, then add the semi-sweet chocolate chips. Mix together until the chocolate melts into the cream (microwave in 10-15 second increments if the chocolate doesn’t melt completely but be careful not to burn the chocolate!), then add butter and mix until fully melted and smooth. Pour the ganache on top of the chocolate cake while it’s still on the wire rack to prevent making a huge mess. The ganache will thicken as it cools so be sure to pour while it’s still warm.
Pro Baking Tips
- Swirl gently, Less is more! Two to three slow passes with a wooden skewer or butter knife is all you need. Over-swirling blends the batters and dulls the marble effect.
- Use a kitchen scale to measure the ingredients! Using a kitchen scale gives you consistent, bakery-level results every time. no guessing, It’s the easiest way to make sure your cakes come out exactly the way I tested it here in my kitchen, every single time.
- Whisk the wet ingredients thoroughly first. That full minute of whisking the sugar, oil, dairy, and vanilla matters. It fully dissolves the sugar and creates a smooth base so the batter bakes up tender, not grainy.
- Don’t overmix once the flour goes in. Mix just until no dry patches remain, about 30 seconds is perfect. Overmixing at this stage can lead to a tight or rubbery loaf.
- Alternate in thin layers for cleaner swirls. Smaller pours (about ½ cup at a time) create more defined marbling than dumping large amounts of batter at once.
- Expect a runny batter, it’s supposed to loaf this way. Both batters should be fluid. This looser consistency allows the vanilla and chocolate layers to marble naturally instead of clumping or sinking.
Recipe FAQs
Over-swirling blends the batters together. For best results, two to three gentle passes with a skewer is all you need for defined, bakery-style marbling.
Yes! It’ll bake a lot quicker but likely won’t be as tall as it would be baked in a loaf tin. Keep an eye on bake time, I’d start checking around the 30 minute mark.
Cocoa powder absorbs liquid quickly. The hot coffee in this recipe balances the texture so both batters swirl evenly.
Insert a wooden skewer into the center where the chocolate and vanilla meet. It should come out with a few moist crumbs but no wet batter.
Yes! This loaf actually tastes better the next day. Wrap it tightly with plastic wrap once cooled and store at room temperature for up to 5 days.
More Loaf Cake Recipes
Breakfast
Chocolate Loaf Cake Recipe
Desserts
Coconut Loaf Cake Recipe
Breakfast
Chocolate Banana Bread
Desserts
Lemon Olive Oil Loaf
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Marble Loaf Cake
Equipment
- 9×5 inch loaf pan
Ingredients
- 1 cup + 3 tbsp (238 g) Sugar
- 3/4 cup + 1 tbsp (180 g) Vegetable Oil
- 1 tbsp Vanilla Extract
- 1/2 cup (120 g) Sour Cream
- 1/4 cup (60 g) Whole Milk, (room temperature)
- 4 large (200 g) Eggs, (room temperature)
- 2 cups (250 g) All Purpose Flour
- 1 tsp Kosher Salt
- 1 1/2 tsp Baking Powder
- 1/8 tsp Baking Soda
Chocolate Swirl
- 1/3 cup (28 g) Dutch Process Cocoa Powder
- 1 tsp Espresso Powder, (optional)
- 3 tbsp (42 g) Hot Coffee, (you can also use hot water if you don't have coffee)
Chocolate Glaze
- 1 cup (170 g) Semi-Sweet Chocolate Chips
- 1 cup (240 g) Heavy Cream
- 2 tbsp Salted Butter
Instructions
- Preheat the oven to 350 degrees F. Spray a 9×5 inch loaf pan with nonstick baking spray. Line with parchment paper so that there's about 2 inches overhang on both longs sides. (this makes it easier to remove from the pan)
- In a large bowl, combine sugar, oil, vanilla extract, sour cream, and whole milk. Whisk together for about 1 minute, until everything is combined and smooth, then add in the eggs and continue to mix until combined, about 1 minute. 1 cup + 3 tbsp Sugar 3/4 cup + 1 tbsp Vegetable Oil 1 tbsp Vanilla Extract 1/2 cup Sour Cream 1/4 cup Whole Milk 4 large Eggs
- Add in the dry ingredients – all purpose flour, kosher salt, baking powder, and baking soda. Mix until smooth and there are no patches of flour, about 30 seconds. 2 cups All Purpose Flour 1 tsp Kosher Salt 1 1/2 tsp Baking Powder 1/8 tsp Baking Soda
- Pour 1/2 of the batter (about 1 1/2 cups, 360g) into a separate bowl. Add the cocoa powder, espresso, and hot coffee. Whisk together until smooth. 1/3 cup Dutch Process Cocoa Powder 1 tsp Espresso Powder 3 tbsp Hot Coffee
- Both batters will be rather runny, this is how it's supposed to be! Pour about a 1/2 cup of the yellow cake batter into the loaf, then begin pouring a little of the chocolate batter on top of the yellow cake batter. Repeat this process, alternating until both batters are gone. Take a long wooden skewer or butter knife and swirl the batter gently.
- Bake for 50-60 minutes, until a wooden skewer inserted into the center of the cake comes out with just a few moist crumbs.
- When the loaf has cooled completely, prepare the chocolate ganache topping by adding heavy cream to microwave safe bowl. Warm for one minute, then add the semi-sweet chocolate chips. Mix together until the chocolate melts into the cream (microwave in 10-15 second increments if the chocolate doesn't melt completely but be careful not to burn the chocolate!), then add butter and mix until fully melted and smooth. 1 cup Semi-Sweet Chocolate Chips 1 cup Heavy Cream 2 tbsp Salted Butter
- Pour the ganache on top of the chocolate cake while it's still on the wire rack to prevent making a huge mess. The ganache will thicken as it cools so be sure to pour while it's still warm.
Notes
- Use a kitchen scale to measure the ingredients! Using a kitchen scale gives you consistent, bakery-level results every time. no guessing, It’s the easiest way to make sure your cakes come out exactly the way I tested it here in my kitchen, every single time.
- Whisk the wet ingredients thoroughly first. That full minute of whisking the sugar, oil, dairy, and vanilla matters. It fully dissolves the sugar and creates a smooth base so the batter bakes up tender, not grainy.
- Don’t overmix once the flour goes in. Mix just until no dry patches remain, about 30 seconds is perfect. Overmixing at this stage can lead to a tight or rubbery loaf.
- Alternate in thin layers for cleaner swirls. Smaller pours (about ½ cup at a time) create more defined marbling than dumping large amounts of batter at once.
- Expect a runny batter, it’s supposed to loaf this way. Both batters should be fluid. This looser consistency allows the vanilla and chocolate layers to marble naturally instead of clumping or sinking.
- Swirl gently, Less is more! Two to three slow passes with a wooden skewer or butter knife is all you need. Over-swirling blends the batters and dulls the marble effect.
Nutrition
Nutrition information is automatically calculated, so should only be used as an approximation.
I’m not even a coffee drinker but really enjoyed this dessert! Easy to make, too.
Made this for a Sister’s Potluck and me and my sissys loved it so so much! The chocolate and the coffee notes went so well and this was super delicious!