Birthday Sheet Cake

Ingredients

  • For the frosting:
  • 18 tablespoons (2 1/4 sticks) unsalted butter, at room temperature
  • 3 cups sugar
  • 6 extra-large eggs, at room temperature
  • 8 ounces (about 1 cup) sour cream, at room temperature
  • 1 1/2 teaspoons pure vanilla extract
  • 1 lemon, zested
  • 3 cups all-purpose flour
  • 1/3 cup cornstarch
  • 1 teaspoon kosher salt
  • 1 teaspoon baking soda
  • nocoupons
  • 24 ounces semisweet chocolate chips
  • 1 1/2 cups heavy cream
  • 2 tablespoons light corn syrup
  • 1/2 teaspoon pure vanilla extract
  • 4 tablespoons (1/2 stick) unsalted butter, at room temperature
  • Chocolate candies for decorating (recommended: M&M's)

Preparation

Step 1

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.