Pumpkin Whoopie Pies

Ingredients

• 4 tablespoons unsalted butter
• 4 ounces full-fat cream cheese , softened, not melted
• 1 teaspoon vanilla extract
• 3/4 cup granulated white sugar
• 1/2 teaspoon fine sea salt
• 1 teaspoon baking powder
• 1 teaspoon baking soda
• 1/2 cup unsalted butter
• 2 cups powdered sugar
• 1/8 teaspoon fine sea salt
• 1 CUP canned pumpkin
• 2 teaspoons ground cinnamon
• 2 and 1/2 cups white, all-purpose flour
• 1 and 1/2 teaspoons pumpkin pie spice
• 3/4 cup light brown sugar
• 1 large egg