Preheat oven to 350°F. Line a baking sheet with parchment paper or spray with non-stick spray.
Add diced apples and butter to a saucepan. Cook on medium heat for about 5 minutes, until the butter is melted.
Stir in lemon juice and brown sugar. Let the mixture cook another 5–10 minutes, until the apples are soft.
In a small bowl, mix together the water and cornstarch.
Stir the cornstarch mixture into the apples until thickened. Let it cool.
Roll out the first pie crust and use a 3-inch round cutter to cut out as many circles as you can.
Roll out the second crust and slice it into ¼-inch strips using a knife or pizza cutter.
Lay half the strips vertically, spaced about ½ inch apart. Fold every other strip up and begin weaving in horizontal strips to create a lattice. Continue until the pattern is complete.
Lightly press the strips together and cut out circles using the same 3-inch cutter.
Spoon about one tablespoon of apple filling onto each pie crust circle.
Place a lattice top over each and press the edges together with a fork. Bake for 18–20 minutes.
Mix powdered sugar and heavy cream together to make a quick icing.
Once the cookies have cooled, drizzle with icing.