The Best Chocolate Potato Cake

All I can say about this unique cake is that it's very, very good. Incredibly moist, sweet and fudgy, it's mixed in the food processor! And the potato is used raw, so there's no cooking, and waiting for it to cool. A super simple batter. The chocolate peanut butter frosting is just, literally, the icing on this fabulous cake.

Originally published in August 2017, the text and images have been updated to serve you better; the recipe remains the same, of course!

As I bake a lot, so I like to find recipes that have unique flavor combinations. A chocolate cake with a grated potato in the batter certainly caught my attention. And I'm glad it did.

I've made many things with potatoes, like bread and rolls, but it always involved them being baked. And truthfully, it's an extra step that I'm not a fan of. So that's the reason why I originally dived into this recipe.

As you can see, I found the best recipe for chocolate potato cake. And easy. And it can be made ahead. All good.

The potato

Since the potato is the guest here, we should talk a bit about it.

The magic of this cake, in my opinion, is that the potato is used raw. Just grate it and mix it. No need to steam or boil it, make a puree, then wait for it to cool, bla, bla, bla.

I live in Buenos Aires and we don't have access too many potato varieties. We have regular Russet potatoes and a variety that has darker skin. Both are very common. This is to explain that any potato can be used. Even sweet potatoes.

I think that if you have access to a creamier potato the consistency would be fudgier. That said, the cake is amazing with any regular potato, and there's no need to buy fancy ones.

How to make this recipe

1. Shred raw potato (image above).
2. Put all ingredients in the processor, including potato. Mix well.
3. Scrape chocolate batter into prepared pan and bake.
4. Make the one-bowl peanut butter chocolate frosting.
5. Frost top of cooled cake.
6. Eat cake with frosting.

The peanut butter chocolate frosting was a last-minute addition when I updated this post years ago. I thought the cake needed something more, for the pictures really.

It turned out to be perfect. And amazing by itself. So use it with any other chocolate cake or the best oatmeal muffins for breakfast, or whatever you want. Even as a spread for toast!

The frosting

1. Melt chocolate with some of the cream. I find it's the easiest way to melt it in the microwave without risk of burning it. Even so, you have to be very careful and put the bowl in 10-second spurts and mix it well before popping it again. Sometimes the chocolate looks whole but it is mostly melted already in the center.
2. Mix with the peanut butter (image below, left).
3. Add powdered sugar and/or cream until you get the consistency you want (image below, right). It depends a lot on how thick the peanut butter and cream are. A lot. Sometimes you don't need to add any sugar.

This for me is one of those perfect everyday chocolate cakes. It can be made in any pan you want - cupcakes, round layers, square, even loaf pan.

I like to make it in a square pan (image above) because I like to cut cakes in squares. It's sort of a sheet cake.
It's probably my favorite pan.

Frosting the cake

I find that a layer of frosting on the top is all it takes to make the cake extra special.

If you have a small baking icing spatula (image below, right) by all means use it. But a smooth blade everyday knife will do the job perfectly. No need to go buying gadgets you might not use regularly.

My top tips

• Organization: always read the recipe first and make sure you have all the ingredients, at the right temperatures, and also the rest of the equipment and space to make it. This will make the process so much easier!
• Potato: I use Russet, which for me are the regular, everyday ones. The original recipe is made with Idaho potatoes, and, according to this article that explains types of potatoes, they are similar in starch content, which is what makes the difference because it can make the cake more or less fudgier. So make it with your favorite and see how it goes. It will be amazing with any type of potato, but you might see subtle differences.
• Make ahead: the chocolate cake can be baked in advance and kept in the refrigerator for 3-4 days, or in the freezer for a month, always well wrapped. Same with the frosting, it keeps well for 1-2 weeks in the refrigerator, covered.
• Pans: it can be made in any pan you want - cupcakes, round layers, square, even loaf pan. I like to make it in a square pan (image above) because I like to cut cakes in squares. It's sort of a sheet cake.
• Frostings: I love the combination with peanut butter (who doesn't, right?), but this goes well also with out magic 5-minute Chocolate Frosting, or with a ganache frosting like the one found in the Chocolate Ganache Bundt Cake recipe. Or a dusting of powdered sugar if you like plain, delicious chocolate cakes.
• Sweet potato: did you know you can also use them instead of the potato? Yes, it's a great substitution.

So, the ever-popular potato found its way into this truly wonderful chocolate cake. I hope you make it. It's so easy and interesting, you should give it a try. Did I mention the potato is used raw?

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Let me know in the comments below if you made this recipe and loved it, and also if you had issues, so we can troubleshoot together. I love to hear what you think, always. Thanks for being here, it's much appreciated.
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~ Enjoy the day and eat delicious!

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Adapted from an old Bon Appétit magazine