Thursday, November 20, 2008

Sweet Potato Cake w. Orange Filling and Chocolate Frosting (TCS)

This is my second post for The Cake Slice, which is a lovely group that is baking its way through Sky High: Irresistible Triple-Layer Cakes by Alisa Huntsman and Peter Wynne. Baking through this book has been treat, as it gives me an excuse every month to make delicious, interesting and ginormous triple layer cakes (DH and my work colleagues get to benefit from the sweet windfall of my baking endeavors).

This month’s recipe for The Cake Slice bakers is Sweet Potato Cake. Now, I’ve had sweet potato pie, but sweet potato in a cake? This would be a first for me. I was intrigued by the combination of sweet potato, spices, orange and chocolate flavors, and was very curious to see how this would all come together.

The cake, filling and frosting were a breeze to prepare (adjustments I made are highlighted in parentheses). The resulting cake was extremely delicious and it was impossibly moist --- YUM! I didn’t get much of a sweet potato flavor from the cake, as the predominant flavors came from the spices.

I did enjoy the orange filling, as it provided a nice complement to the spices and chocolate flavors. The frosting was your typical cream cheese frosting, with the addition of some melted chocolate. I cut back on the powdered sugar, and it was still a bit too sweet for my taste --- I think I’m going to cut the powdered sugar down by half the next time around…and there will definitely be a next time for this recipe!

To see beautiful and delicious versions of this recipe, check out The Cake Slice Bakers blogroll.


Sweet Potato Cake
From Sky High: Irresistible Triple-Layer Cakes by Alisa Huntsman and Peter Wynne (pp 178-181)
Makes a 9-inch triple layer cake, serves 16-20 people

2 medium or 1 large sweet potato (12 ounces)
3 cups of cake flour
3 teaspoons of baking powder
1 and 1/2 teaspoons of ground cinnamon
3/4 teaspoon of ground nutmeg
1/4 teaspoon of cloves
5 eggs, separated
2 and 1/4 cups of sugar
1 stick plus 2 tablespoons of butter, at room temperature
1 and 1/2 teaspoons of vanilla
1 and 1/4 cups of milk

1. Preheat the oven to 400F degrees. Prick the sweet potatoes in 2-3 places, place on a small baking dish and bake for 1 hour or until the potatoes are very soft. Remove from the oven and cool slightly. (I baked the sweet potatoes the day before and kept them in the fridge)

2. Reduce the oven temperature to 350F degrees. Butter the bottoms and the sides of the pans and line with parchment paper. Butter the parchment paper also.

3. When the sweet potatoes are cool peel off the skin and remove any dark spots. Cut the potatoes into chunks and puree in a food processors. Puree until smooth. Measure out one cup of potato puree and set aside. (I skipped pureeing in the FP; instead I whipped the potatoes in the stand mixer using a paddle attachment, and then added the rest of the ingredients as written)

4. Sift the flour, baking powder, cinnamon, nutmeg, and ground cloves. Set aside.

5. In the bowl of electric mixer add the egg whites and attach whip attachment. Beat on medium speed until egg whites are frothy. Raise the speed to high and gradually beat in 1/4 cup of sugar. Continue to beat until the egg whites are moderately stiff.

6. In another large bowl with the paddle attachment, combine the sweet potato, butter, vanilla, and remaining sugar. Beat until light and fluffy. Add the egg yolks one at a time. Make sure to scrape the sides of the bowl after each egg yolk is added. With the mixer on low speed, add the dry ingredients and milk in alternately in 2-3 additions making sure to begin and end with the dry ingredients.

7. With a large spatula, fold in one fourth of the egg whites into the batter to lighten. Then fold in the remaining egg whites until no streaks remain. Making sure to not over mix or this will deflate the batter. Divide the batter among of the three pans.

8. Bake for 25-30 minutes or until a cake tester comes out clean. Let the cake layers cool in the pan for 10 minutes. Then turn out the cake layers onto a wire rack and cool completely at least 1 hour.

9. To assemble the cake, place one layer flat side up on to a cake stand. With a pastry bag fitted with a 1/2 inch round tip and filled with chocolate cream cheese icing, pipe border around the edge of the cake. Fill the center with the orange cream filling smoothing it to the edge of the border. Place the second layer on top and repeat the process. Place the third layer on top and use all the chocolate cream cheese frosting to cover the top and sides of the cake.

Chocolate Cream Frosting
makes 3 cups

10 ounces cream cheese at room temperature
1 stick of butter at room temperature
16 ounces of powdered sugar; sifted (decreased to 12 ounces)
1 and 1/2 ounces of unsweetened chocolate melted and slightly cooled (increased to 3 ounces)

1. In a large mixing bowl, beat together the cream cheese and butter until fluffy. Slowly add the powdered sugar to cream cheese butter mixture making sure to scrape down the sides the sides of the bowl. Then beat until light fluffy 2-3 minutes.

2. Measure out 1 cup of frosting and set aside.

3. Add the melted chocolate to the remaining icing in the bowl and beat until well combined.

Orange Cream Filling

1 cup of reserved cream cheese icing from above
2 tablespoons of frozen orange juice concentrate, thawed
1/4 teaspoon of orange extract (omitted)

1. Stir together all the ingredients until well mixed.


The Food Librarian said...

Your cake turned out beautiful! I love your frosting technique. I loved this cake and can't wait for the next one!

Rosie said...

Your cake looks so lovely Linda. Well done.

Rosie x

Anonymous said...

I love your frosting technique also. Great presentation and so very yummy looking.

Jo said...

Your cake looks wonderful and the frosting ... hmm, wish I was having more now!

Jodie said...

Great presentation! I thought this cake was really good, too- so moist! I wasn't brave enough to try the orange filling since we don't like citrus desserts, but it was great!

Katie said...

Your cake looks wonderful. I love the swirl you made on top with the frosting.

TeaLady said...

Looks really pretty. Nice and moist. Yummy!! Great cake.

steph- whisk/spoon said...

i agree that it was more of a spice cake, but totally delicious! yours looks super-yummy! :)

Bunny said...

You did a fantastic job, i really enjoyed the flavor combinations too!

Shari said...

That's a gorgeous looking cake!

Miss Honey said...

Wow, this looks delicious, I never would have thought of this combination myself lol.

I've just tagged you in my blog (after I was tagged by another blogger), pop over and have a looksee, it's fun:)

Anne said...

Wow- it looks fabulous! I love the color of the cake and the circular pattern on top. Great job!

Megan said...

Wow - cool looking swirls!

Liz said...

I love the way you decorated and presented the cake! And sweet potato cake sounds really interesting. I like pumpkin cake, so I guess it's the same idea? I just may have to try it this fall!

Caroline said...

Your cake is so pretty, love the big swirly frosting on top!

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Anonymous said...

Beautiful job with putting that recipe together! Those flavors do sound delicious, some of my favorites. They sound so warm and flavorful :).

Deborah said...

Your cake looks wonderful!!

Jacque said...

Ooooh, I love the swirly groove on the top... very cool!

It looks delish :)

Gigi said...

i love how frosted the top of your cake. very fab. great job on your cake. i can't wait to see next months cake!

Julie said...

Wow, what a cake! I love sweet potatoes, I'll give this recipe a try for sure.

Anonymous said...

I'm jealous, your frosting looks nice and thick. I barely had enough to cover my cake!

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