Apple Squares

Ingredients

• Crust
• 1 c flour
• 1 Tbs mahlab ( optional )
• 1/2 tsp salt
• 4 Tbs butter cut in 1/4 in. square, 1/8 in thick
• 2 Tbs shortening
• 1 large egg - separated
• 1/2 Tbs lemon juice
• 2 Tbs buttermilk ( or water )
• Filling
• 4 apples - peeled, cored, 1/8-inch thick slices, or more to taste
• 1/3 c sugar
• 2 Tbs dark brown sugar
• 1 Tbs tapioca flour ( or 1.5 Tbs flour )
• 1/4 tsp cinnamon
• 1/8 tsp nutmeg
• dash ginger
• dash cardamom
• dash clove
• Icing
• 1/4 c powdered sugar
• 2 tsp cream
• 1/8 tsp vanilla
• pinch salt