Rainbow Cake

Finally I received the ingredients I ordered for rainbow cake after waiting for a long time. I postponed the rainbow cake many times because I didn't receive the wilton food colours I ordered and finally I have them.

I couldnt imagine I would be this happy for an order. I decided to make the rainbow cake after I watched Martha Stewart show.  Colors are very vivid and cheering, as if it is not for eating but for decoration.

Spring hasnt come to Stockholm yet and snows hasnt melted but the rainbow cake make you feel the spring right now. I am not professional about cakes in fact, this is my first trial. Making cakes is really fun and amusing. I feel released from everything and just focus on the cake which I guess relax me. Even my husband asks me if I am not tired while cooking cake but actually I do not get tired and feel very happy while cooking

For my rainbow cake I used wilton 8 food color gel because they are very vivid and assure the cake to be beautiful.

 Ingredients


Vegetable shortening
3 cups all-purpose flour
4 teaspoons baking powder
1/2 teaspoon salt
2 sticks (1 cup) unsalted butter, room temperature
2 1/3 cups sugar
5 large egg whites, room temperature
2 teaspoons pure vanilla extract
1 1/2 cups milk, room temperature
Red, orange, yellow, green, blue, and purple gel food coloring



Preparation


1) Preheat oven to 180 C. Use as many 23 cm cake pans as possible. Line bottom of each cake pan with parchment paper; brush again and set aside.


2) In a large bowl, whisk flour, baking powder and salt; set aside. In the bowl of an electric mixer fitted with the paddle attachment, cream together butter and sugar. Slowly add egg whites and mix until you get homogeneous mixture. Add vanilla and mix until fully incorporated. Add flour mixture and milk in two alternating additions, beginning with the flour and ending with the milk. Mix until well combined.

3) Divide batter evenly between six medium bowls. Add enough of each color of food coloring to each bowl, whisking, until desired shade is reached. Transfer each color to an individual cake pan. Transfer to oven and bake until a cake tester inserted into the center of each cake comes out clean, about 15 minutes (working in batches if necessary).

4) Remove cakes from oven and transfer to a wire rack; let cool for 10 minutes. Invert cakes onto a wire rack; re-invert and let cool completely.

5) Using a milled knife, trim tops of cakes to make level. Place four strips of parchment paper around perimeter of a serving plate or lazy Susan. Place the purple layer on the cake plate. Spread a scant 1 cup buttercream filling over the first layer with a small offset spatula so it extends just beyond edges. Repeat process with blue, green, yellow, and orange layers.

6) Place the remaining red layer on top, bottom-side up. Gently sweep away any loose crumbs with a pastry brush. Using an offset spatula, cover the top and sides with a thin layer of frosting (also use any of the excess frosting visible between the layers). Refrigerate until set, about 30 minutes.

  Using an offset spatula, cover cake again with remaining frosting.

Ingredients

For The Filling And Crumb Coat

9 large egg whites
1 3/4 cups sugar
2 cups (4 sticks) unsalted butter, cut into small pieces, room temperature
2 teaspoons pure lemon extract

For The Frosting

5 large egg whites
1 cup sugar
1 cup (2 sticks) unsalted butter, cut into small pieces, room temperature
1 teaspoon pure lemon extract


Preparation


Make the filling and crumb coat: Cook egg whites and sugar in a small saucepan over medium heat, whisking constantly until sugar is completely dissolved. Transfer to the bowl of an electric mixer fitted with the whisk attachment; mix on high speed until mixture is room temperature. With the mixer on medium-low, add butter, one piece at a time, mixing well after each addition.

Remove whisk attachment and switch to paddle attachment. Increase speed to high and beat until buttercream comes together, about 5 minutes; beat in lemon extract.

Make the frosting: In a clean saucepan and bowl of an electric mixer, repeat process in step 1.