Rainbow Petal Sheet Cake Recipes

Steps:

• Heat oven to 350° F. Spray 3 (8-inch) round cake pans with cooking spray.
• In large bowl, beat cake ingredients with electric mixer on low speed 30 seconds. Beat on medium speed 2 minutes. Pour batter into pans.
• Bake 18 to 20 minutes or until cake springs back when touched lightly in center. Cool 10 minutes; remove from pans to cooling racks. Cool completely.
• In large bowl, beat shortening and butter with electric mixer on medium speed until light yellow. On low speed, gradually beat in powdered sugar. Beat in vanilla. Add milk, 1 tablespoon at a time, beating until frosting is smooth. Beat on high speed until light and fluffy.
• Place 3 cups frosting in separate bowl; stir in pink food color. Divide remaining frosting (about 1 cup for each color) among 5 bowls; tint with remaining food colors. Trim rounded tops off cakes to level, if needed. On serving plate, place 1 cake layer. Spread with pink frosting to within 1/4 inch of edge. Repeat with remaining cake layers. Spread thin layer of frosting on top and side of cake to seal in crumbs.
• Spoon 1 color frosting into decorating bag fitted with #12 tip. Pipe row of straight dots on cake from top to bottom. Gently spread each dot with offset pastry knife, cleaning knife after each time. Repeat with remaining colors of frosting. Create another row of dots where frosting ends and spread each dot with knife. Repeat until whole cake is finished. When scallops end, add final row of dots to "seal" the seam. Pipe top of cake with one dot at a time; spread and then pipe again, creating a concentric circle.

Steps:

• Preheat the oven to 350 degrees F (175 degrees C). Grease a 9x13-inch baking pan with baking spray and line with parchment paper; spray parchment with baking spray.
• Prepare Cake: Beat butter in a stand mixer fitted with a paddle attachment on medium speed until creamy, about 30 seconds. Gradually add white sugar; beat until light and fluffy, 2 to 3 minutes. Add eggs, 1 at a time, and beat just until incorporated after each addition, about 1 minute total. Add vanilla and beat until combined, about 15 seconds. Scrape down sides and bottom of bowl using a flexible spatula.
• Whisk together flour, baking powder, and salt in a medium bowl until combined. Add flour mixture to butter mixture alternately with milk, beginning and ending with flour mixture, beating on low speed just until combined after each addition.
• Divide batter equally between 6 small bowls. Add one to two drops of food coloring to each bowl, tinting one bowl red or pink, one orange, one yellow, one green, one blue and one purple. Mix gently to combine and add additional coloring as needed to reach desired shades.
• Dollop the batter into the prepared pan, alternating colors, until the whole pan is filled. [If you have leftover batter, top up existing dollops of the same color - don't make a second layer of different colors]. Gently bang the pan on the counter to ensure that the batter is evenly distributed and that all gaps are filled.
• Bake in the preheated oven until a toothpick inserted in the center comes out clean, about 30 minutes. Cool in pan for 15 minutes. Remove cake from pan and cool on a wire rack until completely cool, at least 1 hour.
• Prepare frosting: Beat cream cheese and butter in a stand mixer fitted with a paddle attachment on medium speed until smooth, about 1 minute. Reduce mixer speed to low, and gradually add powdered sugar, beating until incorporated, about 2 minutes. Add vanilla and salt, then increase mixer speed to medium, and beat until fluffy, about 1 minute.
• Spoon out 1/4 cup of frosting into each of 3 small bowls. Add one to two drops of food coloring to each bowl, tinting one bowl red or pink, one orange, and one green. Mix well to combine and add additional coloring as needed to reach desired shades. Transfer each of the colored frostings to piping bags fitted with small round writing tips. Leave the remaining frosting in the mixing bowl white.
• Using a serrated knife, trim the edges of the cake. Frost the top of the cake with the white frosting, leaving the sides uncovered. Use the colored frosting to pipe small rainbows across top of cake.

Steps:

• Heat oven to 350°F. Spray 3 (8-inch) round cake pans with cooking spray.
• In large bowl, beat cake mix, water, oil and eggs with electric mixer on low speed 30 seconds, then on medium speed 2 minutes, scraping bowl occasionally. Divide batter evenly among 6 small bowls, about 1 1/3 cups each.
• Using food colors, tint batter in 1 bowl blue, 1 bowl red, 1 bowl green, 1 bowl yellow, 1 bowl orange (using red and yellow) and 1 bowl purple (using blue and red).
• Refrigerate 3 colors of batter until ready to bake. Pour remaining 3 colors of batter into cake pans.
• Bake 18 to 20 minutes or until cake springs back when touched lightly in center and begins to pull away from side of pan. Cool 10 minutes. Remove from pans to cooling racks; cool completely.
• Wash cake pans. Bake and cool remaining 3 cake layers as directed.
• In large bowl, beat shortening and butter with electric mixer on medium speed until light yellow. On low speed, gradually beat in powdered sugar. Beat in vanilla. Add milk, 1 tablespoon at a time, beating until frosting is smooth. Beat on high speed until light and fluffy.
• Trim rounded tops off cakes to level, if needed. On serving plate, place purple cake layer. Spread with frosting to within 1/4 inch of edge. Repeat with blue, green, yellow, orange and red cake layers. Spread light coat of frosting on top and side of cake to seal in crumbs, then frost with remaining frosting.