Lemon Squares

Ingredients

• 1 cup all-purpose flour, plus
• 2 tablespoons all-purpose flour, divided
• 1/2 teaspoon baking powder, divided
• 1/4 teaspoon baking soda
• 1/4 teaspoon salt
• 1 1/4 cups sugar, divided
• 2 teaspoons lowfat margarine (*Note)
• 2 teaspoons canola oil (**Note)
• 1/2 cup egg beaters 99% egg substitute, plus
• 2 teaspoons egg beaters 99% egg substitute (***Note, Divided)
• 1 tablespoon grated fresh lemon rind, divided
• 1/4 cup fresh lemon juice
• 1 large egg
• confectioners' sugar, for dusting