Thursday, November 20, 2008

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The Cake Slice: Sweet Potato Cake

I know I have said it a million times but I love baking groups. Love them! One of the main reasons I love them so much (other than having a reason to bake) is because they have the tendency to choose recipes that are out of my baking comfort zone. Take this month's cake selection for The Cake Slice: Sweet Potato Cake. When I think of sweet potatoes I think of Thanksgiving and eating them topped with a thick layer of gooey, chewy marshmallows. I would have never thought about making a cake with sweet potato as the star of the show. This cake was absolutely delicious and the frosting was out of this world. The cake tasted similar to other sweets that call for pumpkin puree because of all the spices but, in my opinion, so much better. Now I can say I have another reason to love sweet potatoes.

Sweet Potato Cake
Source: Alisa Hunstman's Sky High

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

(**The recipe calls for cake flour and if you only have all-purpose flour on hand, you can substitute 3/4 cup (105 grams) all purpose flour plus 2 tablespoons (30 grams) cornstarch.)

(*If fresh sweet potato is not available where you live you may use canned sweet potato, yams, and pumpkin puree)

Makes a 9-inch triple layer cake, serves 16-20 people

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.

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.

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

1 and 1/2 ounces of unsweetened chocolate melted and slightly cooled

(***1 cup of cream cheese maybe substituted with 1 cup pureed cottage cheese
OR 1 cup plain yogurt, strained overnight in a cheesecloth OR equal amounts of neufatel cheese)

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

1. Stir together all the ingredients until well mixed.


The filling was divine!

I had some extra batter so I made a cupcake.


Jo said...

Great job and I like your cupcake version as well. So cute.

The Food Librarian said...

Yummy! Great job. I loved this cake...perfect spices and cream cheese filling. Your cupcake is adorable!

Jacque said...

I completely agree about baking groups and getting out of your comfort zone.

Mmmm, you cake looks fantastic!

Caroline said...

Your cake looks great! You're right about baking groups and unusual ingredients. This is my first time to bake sweet potato in a cake.
Oh, and your cupcake is too cute!

SiHaN said...

absolutely love the bright hues from the first photo. very nice indeed! and i'm glad that you enjoyed the recipe. Never wld i have thought of sweet potato in a cake until now!

Linda said...

ditto on your comment on baking groups...i would have never made this recipe on my own. Your cake looks fantastic!!!

Gigi said...

Great job on your cake! I love the top photo! And the cupcakes are very cute.