Fudge marble cakes typically feature a white cake and fudge chocolate cake that have been swirled together before baking. Once baked it’s a delightful combination of rich chocolate and creamy vanilla. There’s really no wrong way to frost a marble cake, but for the best tasting results, you want a frosting that enhances its flavor.
Try a Buttercream
Buttercreams are smooth, rich and creamy. Traditionally made from butter, powdered sugar, milk and sometimes shortening, this frosting can be smoothed on or piped over your cake. Top off your marble cake with a vanilla bean buttercream or add a little extra chocolate by smearing on a layer of milk or dark chocolate buttercream. For something a little different, try a mocha, coconut or orange-flavored buttercream.
Swirl on Cream Cheese
Cream cheese frosting is spreadable like buttercream, but it has a distinct tangy flavor too. It’s traditionally made from cream cheese, butter, powdered sugar and vanilla. You can change it up by using a chocolate, strawberry or raspberry cream cheese frosting too.
Ganaches are velvety, smooth and made from chocolate. To make, use equal parts heavy cream and milk, dark or white chocolate. Heat the cream and pour it over the chopped chocolate, then whisk until smooth. While the mixture is freshly melted, spread it on top of your cooled marble cake and then let it set in the refrigerator -- which typically takes about 15 to 30 minutes. For a fluffier, lighter frosting, put your freshly made ganache into the mixer and whisk it on medium speed until it fluffs up -- similar to whipped cream. Then, spread it on your cake.
Whipped Frosting Works Too
If you’re looking for an airy, lighter frosting, whipped cream frosting can be used to top off a fudge marble cake. While vanilla whipped cream frosting works just fine, you can change it up by making a chocolate, mocha or even strawberry whipped cream frosting too.
Pour On a Quick Glaze
Sometimes there just isn’t enough time to make a frosting from scratch. A glaze is a pourable frosting that sets quickly and leaves your cake with a smooth, glossy finish. To make the glaze you’ll need to melt one part butter and four parts chocolate -- white, milk or dark-- together. Pour the glaze while it’s hot over your cake and let it chill in the refrigerator for 20 to 40 minutes. Infuse your chocolate glaze with candy oils to add a twist on your chocolate flavor. Peppermint, orange, cinnamon and strawberry oils work well on top of a fudge marble cake.
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