Funfetti Sheet Cake

Bahan-bahan (25 porsi)

• 1 cup (16 Tbsp; 226g) unsalted butter, softened to room temperature
• 2 cups (400g) granulated sugar
• 2 large eggs, at room temperature
• 2 and 1/2 teaspoons pure vanilla extract
• 1/2 cup (120g) sour cream or plain yogurt*
• 2 and 1/4 cups (281g) all-purpose flour (spooned & leveled)
• 1 teaspoon baking soda
• 1/2 teaspoon salt
• 1 cup (240ml) whole milk*
• 1/2 cup (94g) rainbow sprinkles, plus more for decoration*
• 3/4 cup (12 Tbsp; 170g) unsalted butter, softened to room temperature
• 3 cups (360g) confectioners’ sugar
• 2 -3 Tablespoons (30-45ml) whole milk*
• 2 teaspoons pure vanilla extract
• 1/8 teaspoon salt