Homemade Oreos – Rosanna Pansino

Ingredients

• 1 3/4 cups + 2 tablespoons flour
• 2/3 cup Dutch process cocoa powder
• 1/2 teaspoon baking powder
• 3/4 teaspoon salt
• 2 sticks (8 oz) butter, softened
• 3/4 cup granulated sugar
• 1 egg yolk
• 1 teaspoon vanilla
• 4 tablespoons unsalted butter, room temperature
• 5 tablespoons shortening
• 2 cups powdered sugar
• 1/2 teaspoon vanilla