Red Velvet Whoopie Pies with Cream Cheese Filling

INGREDIENTS

• :
• 3 cups all-purpose flour
• 1/3 cup cocoa powder
• 1 teaspoon baking powder
• ½ teaspoon baking soda
• ½ teaspoon salt
• ½ cup unsalted butter, at room temperature
• ½ cup vegetable shortening
• ½ cup light brown sugar
• 1 cup granulated sugar
• 2 eggs
• 2 teaspoons vanilla extract
• 3 teaspoons red food coloring
• 1 cup buttermilk
• 4 ounces cream cheese, at room temperature
• 4 tablespoons unsalted butter, at room temperature
• 3½ cups powdered sugar
• 1 teaspoon vanilla extract