Name: Yellow Sheet Cake with Chocolate Sour Cream Frosting
Yield: 24 Servings
Ingredients: Nonstick vegetable oil spray; 3 cups all-purpose flour; 1½ teaspoons baking powder; 1 teaspoon baking soda; 1 teaspoon kosher salt; 1 cup buttermilk; ⅓ cup vegetable oil; 1 teaspoon vanilla extract; 1½ cups granulated sugar; ⅓ cup (packed) light brown sugar; ¾ cup (1½ sticks) unsalted butter, room temperature; ½ vanilla bean, split lengthwise; 4 large egg yolks; 2 large eggs; 14 ounces semisweet chocolate, chopped; ¼ cup light corn syrup; 2 cups sour cream; 1½ teaspoons kosher salt; 1½ teaspoons vanilla extract; 2¾ cups powdered sugar; ¾ cup (1½ sticks) unsalted butter, room temperature

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Alex Lau

For extra texture, trick out your cake with rainbow or chocolate sprinkles, chopped candies, or your favorite cereal.

Recipe notes