2 1/2 cups flour
1 tsp salt
1 cup cold butter, cut into small cubes
1 egg, separated (will reserve the egg white for the top of the crust)
milk
1 1/2 cups crushed cornflakes
5-6 tart apples, peeled, cored, and thinly sliced (Such as Honeycrisp, Gala, or Granny Smith)
1 1/2 cups granulated sugar
2 tsp cinnamon
For Icing, see below
Directions
1. Combine the flour and salt. Add the cubed butter and mix well. Will resemble coarse crumbs.
2. In a glass measuring cup, add the egg yolk and enough milk to measure 2/3 cup of liquid. Ad to the flour mixture, mixing well to make a smooth dough. You may do this by hand, or use an electric mixer. Note the the dough will be somewhat wet, but as you roll it out, you will be adding a little flour, so it is all okay.
3. Divide dough evenly in half and roll half out onto a floured surface, adding a little bit of flour, as needed. Place the first half onto an ungreased jelly roll pan. Cover the remaining dough with a towel. Sprinkle the crushed corn flakes evenly over the dough.
4. Combine the apples, granulated sugar, and cinnamon together in a bowl. Spread on top of the corn flakes.
5. Roll out the other half of the dough onto a floured surface, adding a little additional flour, as needed. Place on top of the apples and seal the edges.
6. Beat the reserved egg white with a fork until frothy. Brush on top or the crust.
7. Bake at 350 degrees for 1 hour, or until bubbly and golden brown.
Icing
1 cup powdered sugar
4 tsp hot milk
1/2 tsp vanilla extract (may also use maple extract, if desired)
Combine the ingredients until smooth, and drizzle over the warm apple bars.