Red Velvet Cake Trifle with Cream Cheese Mascarpone Frosting, Marshmallow Whipped Cream, and Pecans

Ingredients

• 2 1/2 cups all-purpose flour
• 1 1/2 cups granulated sugar
• 2 tablespoons unsweetened cocoa powder
• 1 teaspoon baking soda
• 1 teaspoon Kosher salt
• 1 1/2 cups vegetable oil
• 1 cup buttermilk
• 2 large eggs
• 1 to 2 tablespoons red food coloring
• 1 1/2 teaspoons distilled white vinegar
• 1 teaspoon vanilla extract
• 4 ounces cream cheese, softened
• 4 ounces mascarpone, softened
• 1/2 cup unsalted butter, softened
• 1 cup powdered sugar
• 1 cup heavy cream
• 1/4 cup powdered sugar
• 1 (7.5 ounce) jar marshmallow fluff
• Pecans, crushed