Preheat oven to 425 degrees F and grease individual cupcake tins. Cream shortening and add sugar. Slowly stir in milk and egg. Sift together flour, baking powder, and salt, and add to mixture. Stir in raisins, add vanilla, and mix well. Fill cupcake tins half full of batter and bake 15 to 20 minutes, until lightly browned. Remove from oven and sprinkle with powdered sugar or frost with.