Classic Birthday Cake | Recipe Reader

Ingredients

• ***For the cake:***
• 6 tablespoons unsalted butter, room temperature, plus more, for greasing the pan
• 2 cups all-purpose flour, plus more, to taste, for dusting the pan
• 1 1/4 cups granulated sugar
• 1/4 cup light brown sugar
• 1 1/2 teaspoons baking powder
• 3/4 teaspoon kosher salt
• 3 tablespoons vegetable shortening
• 1/2 cup buttermilk
• 1/3 cup vegetable oil
• 3 eggs
• 1 egg yolk
• 2 teaspoons clear vanilla extract
• 1/4 cup plus 2 tablespoons rainbow sprinkles, divided
• ***For the frosting:***
• 12 tablespoons unsalted butter, room temperature
• 3 ounces cream cheese, room temperature
• 1 1/3 cups confectioners' sugar
• 1 1/2 tablespoons light corn syrup
• 1/2 teaspoon kosher salt
• rainbow sprinkles, optional, to taste, for topping