SHEET BIRTHDAY CAKES RECIPES

Steps:

• Preheat the oven to 350 degrees F. Butter and flour a 12 by 18 by 1 1/2-inch sheet pan.
• To make the cake, cream the butter and sugar on medium-high speed in the bowl of an electric mixer fitted with a paddle attachment until light and fluffy, about 5 minutes. On medium speed, add the eggs, 2 at a time, then the sour cream, vanilla, and lemon zest, scraping down the bowl as needed. Mix well. Sift together the flour, cornstarch, salt, and baking soda. With the mixer on low speed, slowly add the flour mixture to the butter mixture and stir just until smooth. Finish mixing by hand to be sure the batter is well mixed. Pour evenly into the pan, smooth the top with a spatula, and bake in the center of the oven for 25 to 30 minutes, or until a toothpick comes out clean. Cool in the pan to room temperature.
• For the frosting, place the chocolate chips and heavy cream in a bowl set over a pot of simmering water, stirring occasionally, until the chips are completely melted. Off the heat, add the corn syrup and vanilla and allow the chocolate mixture to cool to room temperature. In the bowl of an electric mixer fitted with the whisk attachment, whisk the chocolate mixture and softened butter on medium speed for a few minutes, until it's thickened.
• Spread the frosting evenly on the cake. Have the children decorate the cake with chocolate candies.

Steps:

• Center an oven rack and preheat the oven to 375°F.
• To make the cake, melt the butter in a large saucepan over medium heat. Whisk in the cocoa. Add the oil and water and bring to a rolling boil for 30 seconds. Remove the pan from the heat and set it aside to cool slightly. Meanwhile, sift together the flour, sugar, baking soda, and salt in a large bowl, then whisk the ingredients by hand to ensure they are well mixed. Pour the warm cocoa mixture into the sifted ingredients and whisk until just combined. In a small bowl, whisk together the eggs, buttermilk, and vanilla. With a rubber spatula, stir the buttermilk mixture into the batter. Pour the batter into the greased pan and place in the center of the oven. Bake until the top is firm and a wooden skewer inserted in the middle of the cake comes out with moist crumbs, 32 to 35 minutes.
• While the cake is in the oven, make the frosting: melt the butter in a saucepan over medium heat. Whisk in the cocoa and bring the mixture to a rolling boil; boil for 30 seconds. Remove from heat and whisk in the milk and vanilla. Add the confectioners' sugar 1 cup at a time while whisking continuously. Immediately after the cake comes out of the oven, pour the frosting over the hot cake and sprinkle with the nuts. Try not to jiggle the cake before it sets or you'll leave waves in the frosting. Allow to cool before cutting into squares.
• Well wrapped and stored at room temperature, this cake keeps for up to 5 days.