Apple Walnut Cups - Pepperidge Farm

Ingredients

• 1 tablespoon butter
• 1 Granny Smith apple, peeled and finely chopped
• 2 tablespoons packed brown sugar
• 2 tablespoons chopped toasted walnuts
• 1 teaspoon lemon juice
• 1 package (9.5 ounces) Pepperidge Farm® Puff Pastry Cups, prepared according to package directions
• 2 tablespoons confectioners' sugar