Ginny's Vanilla Sheet Cake | Cooking Professionally

Ingredients

• ***For the cake:***
• 3 cups cake flour, spooned and leveled
• 1 1/2 cups granulated sugar
• 1 teaspoon baking powder
• 1/2 teaspoon baking soda
• 1/2 teaspoon salt
• 1 cup unsalted butter, cubed and softened to room temperature
• 1 tablespoon pure vanilla extract
• 1 cup whole milk, at room temperature and divided
• 1/3 cup sour cream, at room temperature
• 3 large eggs, at room temperature
• ***For the whipped vanilla buttercream:***
• 1 cup unsalted butter, softened to room temperature
• 4 1/2 cups confectioners' sugar
• 1/3 cup heavy cream
• 2 teaspoons pure vanilla extract
• salt, to taste
• sprinkles, optional, for garnish