Rich, dark caramel mud cake made using real caramel sauce made from scratch. This is every caramel lover’s dream cake! Includes gluten free caramel mud cake option, too!
This recipe is the result of many tests and tweaks. A casual idea to build a caramel mud cake using real caramel became a joint baking session with a friend, a lot of experimentation, and refinements at home. The final cake is rich, moist and intensely caramel-flavoured.
Many so-called “caramel” mud cakes rely on white chocolate plus brown sugar or golden syrup for colour rather than true caramel flavour. This version begins with an actual caramel sauce that forms the flavour base of the cake, delivering a genuine deep caramel taste.
You can finish and decorate the cake however you like; below I describe how I iced mine with caramel Swiss meringue buttercream and finished it with a caramel drip. It’s an ideal cake for anyone who loves caramel.
What Makes This The Best Caramel Mud Cake Recipe:
- Full-on caramel flavour – using real caramel sauce gives the deepest, truest caramel taste.
- Super moist – like all mud cakes this stays moist for days with a dense, slightly fudgy texture.
- Sturdy – the texture makes it suitable for tiered and carved cakes.
- Easy to make gluten-free – a small tweak makes this cake just as moist and delicious with a GF flour blend.
Ingredients
Here’s what you’ll need:
- Cream – standard whipping cream (also called single cream or heavy cream) is needed for the caramel.
- Sugar – caster (superfine) sugar dissolves fastest, but regular sugar will work.
- Corn syrup or liquid glucose – helps prevent the caramel crystallising; optional if you don’t have it.
- Salt – flaky sea salt is recommended to balance sweetness; reduce if using table salt.
- Vanilla extract – use a good quality extract or vanilla paste.
- Milk – full-fat (whole) milk works best.
- Unsalted butter – if you only have salted butter, reduce or omit added salt.
- White chocolate – adds texture more than a pronounced white chocolate flavour.
- All-purpose flour OR gluten-free flour blend – use a reliable GF blend if making the cake gluten-free.
- Xanthan gum – include only if your GF blend does not already contain a gum.
- Baking powder – check it is gluten-free when making a GF version.
- Eggs – large eggs.
To ice and decorate as shown you’ll also need egg whites, more caster sugar, vanilla and unsalted butter for the caramel Swiss meringue buttercream, plus caramel sauce for flavouring and the drip.
How to Make Caramel Mud Cake
Begin by making a proper caramel sauce. Combine sugar, corn syrup (if using) and water and boil until the syrup turns a deep amber (about 160°C/320°F on a sugar thermometer). Remove from heat and carefully whisk in warmed cream—the mixture will spit and steam, so take care. Return to the heat and cook gently until smooth and about 115°C (240°F), or until it deepens slightly in colour and aroma.
Warm the milk and melt the butter into it, then whisk the caramel into the warm milk-butter mixture. Adding cold ingredients directly to hot caramel can cause it to seize, so pre-warming the milk and butter prevents splitting. Stir in chopped white chocolate until melted.
Let the mixture cool until lukewarm, then add sifted dry ingredients in 2–3 additions, folding gently to avoid incorporating too much air. Whisk in the eggs, pour into lined cake pans and bake.
The cakes may crack slightly on top; trimming the thin crust when leveling removes those small cracks. Bake until a skewer or thin knife comes out clean from the centre—mud cakes take longer than lighter cakes and are dense when done.
Caramel Mud Cake Tips
Making the Caramel
Making caramel can be intimidating, but the best way to learn is to try it with careful preparation. Measure and have all ingredients ready, follow the colour and aroma cues, and use a candy thermometer if you have one. Take care when adding cream because the mixture will steam and splatter.
Baking without strips or a foil lid
Unlike some mud cakes, this caramel mud cake is best baked without baking strips or a foil lid. A lid tends to steam the cake and produce a pudding-like texture; omitting the lid yields a cakier, dense and fudgy crumb. If the top browns too quickly, you can tent it lightly with foil later in the bake.
Carving
The cake works well for decorating and carving. If your GF version is softer, chill it briefly to firm it up before carving. For carved cakes, chocolate ganache is a firmer option than buttercream for filling and coating.
Storing the Cake
Stored in an airtight container or sealed with frosting or fondant, the cake keeps for at least a week at cool room temperature. You can also wrap and freeze the cake layers before decorating for longer storage.
How to Decorate the Cake
I flavoured Swiss meringue buttercream with lightly salted caramel sauce and used the same sauce for a drip. I split each baked cake into layers, filled and crumb-coated with the buttercream, then chilled and finished piping stars and swirls along a crescent on top using a variety of star tips for a layered look.
For piping I used a mix of large and small star tips (Wilton 1M, 6B, 4B, 32 and Ateco 34) with couplers to swap tips in the same bags. This layered piping technique hides imperfections and creates an impressive finish with minimal advanced piping skill.
Caramel Drip Tips
Use a chilled cake and warm the caramel just until pourable for the drip—don’t make it too thin. Test the consistency by dripping on a glass first. Caramel drips continue moving longer than ganache, so add the drip close to the time you’ll serve the cake (within a few hours) to avoid pooling.
When serving, add extra caramel over slices if you like—there’s no such thing as too much caramel for a caramel lover.
More Recipes You May Like:
- Gluten Free Chocolate Mud Cake – a rich dark chocolate mud cake that works well for carved designs.
- Gluten Free White Chocolate Mud Cake – a fudgy cake with white chocolate flavour.
- Gluten Free Fruit Cake – a classic gluten-free Christmas cake.
Rich Caramel Mud Cake
Ingredients
- 125 ml whipping cream
- 400 g sugar
- 3 tbsp corn syrup
- 125 ml water
- 1 ½ tsp salt
- 1 teaspoon vanilla extract
- 375 ml milk
- 350 g unsalted butter
- 180 g white chocolate
- 375 g all purpose flour OR gluten free flour blend
- 2 teaspoons baking powder
- ½ teaspoon xanthan gum
- 3 large eggs
Instructions
- Line the base and sides of two 7” round (at least 3” high) cake pans.
- Warm the cream (about 30 seconds in the microwave) and set aside to reduce splatter when added to caramel.
- Place sugar, water and corn syrup in a medium saucepan and stir until moistened. Heat over medium-high, using a wet pastry brush to wash down sugar crystals from the sides as it heats.
- Increase heat and boil until the syrup turns a light amber colour (about 160°C/320°F on a sugar thermometer).
- Remove from heat and carefully pour in the warm cream while stirring. Return to medium heat and bring to a boil, stirring gently until smooth and about 115°C (240°F). Remove from heat, stir in salt and vanilla, and set aside.
- In a separate saucepan, heat the milk and butter together over medium heat until the butter is melted.
- Whisk the caramel into the milk mixture, add the white chocolate and whisk until melted. Cool until lukewarm (use an ice bath to speed cooling if needed).
- Preheat the oven to 150°C (300°F). Sift flour and baking powder (and xanthan gum if making GF).
- Add dry ingredients to the cooled liquid in 2–3 additions, folding gently. Then whisk in the eggs.
- Pour batter into prepared pans, bang gently to remove large bubbles, and bake 75–90 minutes or until a skewer or thin knife inserted in the centre comes out clean. The centre should reach about 99°C if using a probe thermometer.
- Cool cakes for 30 minutes, cover tops with foil and leave in the pans overnight to cool and firm before removing and decorating.
Notes
Gluten Free: Use an all-purpose gluten-free flour blend. If your purchased blend already contains a gum (xanthan, guar, etc.), omit the xanthan called for in the recipe.
If the tops brown too quickly, tent with foil for the remaining bake time. Store the cake in an airtight container or sealed with frosting or fondant for up to a week at cool room temperature, or freeze wrapped for longer storage.
Caramel Swiss Meringue Buttercream
Ingredients
- 210 g egg whites
- 325 g sugar
- pinch of salt
- 450 g unsalted butter
- 1 Tablespoon vanilla extract
- 3/4 cup lightly salted caramel sauce + extra to decorate
Instructions
- Clean the whisk and bowl thoroughly and wipe with lemon juice or vinegar to remove grease.
- Combine egg whites and sugar in the bowl and place over simmering water. Stir until sugar dissolves and the mixture reaches 71°C/160°F.
- Whip the meringue: one minute on medium, then increase to medium-high until stiff and glossy and the bowl is cool.
- Switch to the paddle, add butter piece by piece on low speed until smooth. If it looks curdled, keep mixing and it will come together.
- Warm the caramel so it is just pourable and add with vanilla to the buttercream, then beat to combine. Taste and add more caramel if desired.
- Split and fill your cakes, then finish decorating as desired.
Notes
Troubleshooting: If the buttercream splits, chill the bowl briefly or warm gently over simmering water to bring it back, then beat again. If too soft, chill until the butter firms and re-whip until smooth and pipeable.
Happy Baking!
Natalie
xx