Ina Garten's Birthday Sheetcake Recipe - (4.5/5)

Ingredients

• FROSTING:
• 2 1/4 sticks (18 tablespoons) 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
• 3/4 teaspoon baking soda** (adjusted down from 1 teaspoon., per many reviews of this recipe
• 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)