Apple Bars with Caramel Frosting

5 c. apples, peeled & sliced
1 c. sugar
3 c. flour
1 tsp salt
1 c. butter
1 Tbsp sugar
1 egg
3/4 c. Rice Krispies, crushed
Caramel Frosting
4 oz. cream cheese
1 tbsp. unsalted butter
3 tbsp. caramel sauce
1 tbsp. milk
½ tsp. vanilla extract
1 cup powdered sugar
1. Mix apples and 1 c. sugar together and set aside. Mix flour, salt, 1 Tbsp sugar and melted butter. Put egg yolk (set the egg white aside for later) in 1 c. measuring cup. Add milk to 2/3 line. Mix all these ingredients.
2. Take half of dough and roll out to fit a jelly roll pan. Put dough in the bottom of the jelly roll pan. Sprinkle crushed cereal over the dough. Top with apple mixture.
3. Roll out remainder of dough. Place on top of apple filling. Beat the egg white and brush over the top. Sprinkle a little sugar over the top. Bake at 350 degrees for 45 minutes.
4. While bars are cooling combine the cream cheese and butter in a microwave safe bowl. Microwave in 15-20 second intervals until you can whisk the mixture together. Whisk in caramel sauce, milk and vanilla until smooth. Whisk in the powdered sugar until smooth. Drizzle over bars.