Yellow Sheet Cake with Chocolate Fudge Frosting

Bahan-bahan (25 porsi)

• 2 and 1/4 cups (266g) cake flour (spooned & leveled)
• 2 and 1/2 teaspoons baking powder
• 1/4 teaspoon baking soda
• 1/2 teaspoon salt
• 1 cup (16 Tbsp; 226g) unsalted butter, softened to room temperature
• 1 and 1/2 cups (300g) granulated sugar
• 2 large eggs, at room temperature
• 2 teaspoons pure vanilla extract
• 1/2 cup (120g) sour cream, at room temperature*
• 1 cup (240ml) whole milk, at room temperature*
• 1 cup (16 Tbsp; 226g) unsalted butter, softened to room temperature
• 4 and 1/2 cups (540g) confectioners’ sugar
• 3/4 cup (62g) natural unsweetened or dutch-process cocoa powder
• 1/2 cup (120ml) whole milk
• 1 Tablespoon light corn syrup*
• 1 and 1/2 teaspoons pure vanilla extract
• 1/8 teaspoon salt
• optional: rainbow sprinkles