Easy Blackberry Pie Bars Recipe - Fabulessly Frugal

Ingredients

• 2 1/2 cups all-purpose flour (12 1/2 ounces)
• 1 teaspoon salt
• 1/2 cup shortening
• 1/2 cup unsalted butter
• 1 egg (separated)
• 2/3 cup milk (actually a little less)
• 1/2 cup cornflakes cereal (crushed)
• 3 to 4 cups blackberries
• 2/3 cup sugar (more or less depending on sweetness of berries)
• 2 1/2 tablespoons cornstarch
• 1 to 2 teaspoons lemon zest (optional)
• 1/2 cup powdered sugar
• 1 tablespoon water or milk
• 1/2 teaspoon vanilla