Ginormous Milk Chocolate Peanut Butter Cup for Crowd Recipe

Ingredients

• 4 1/2 cups (about 27 ounces) milk chocolate, chopped or chips, divided
• 4 tablespoons vegetable shortening, divided
• 2 cups smooth peanut butter, not all-natural
• 1/2 cup unsalted butter
• 1 teaspoon pure vanilla extract
• 1/2 tsp kosher salt
• 2 cups confectioners’ sugar
• 1/2 cup light brown sugar