Orange Citrus Bars w/ Orange Glaze

Ingredients (bars):
1 orange, zested
1 cup cold butter, cubed
2 cups granulated sugar
4 large eggs
2 1/4 cups all-purpose flour, divided
1/2 cup confectioners' sugar
1/3 cup orange juice
1/2 teaspoon baking powder

Ingredients (glaze):
4 cups confectioners' sugar
1/2 cup orange juice
1/2 orange, zested



Preheat oven to 325 degrees F.

Crust:
Combine 2 cups flour, and confectioners' sugar. Cut in butter with a pastry blender until mixture is crumbly. Press evenly into bottom of a 13 by 9 by 2-inch baking pan. Bake 20 minutes, or until lightly browned.
Filling:
Whisk together sugar, eggs, and juice until well mixed. Add 1/4 cup flour and baking powder, stirring to combine. Sprinkle in some orange zest. Pour into hot baked crust, and bake 25 minutes, or until set. Cool the lemon bars, so you may top with orange citrus glaze.
For the Orange-Citrus Glaze:
Mix 4 cups of powdered sugar and 1/2 cup orange juice together til it is a creamy glaze sauce consistency. Add orange zest. Pour onto bars once they have cooled.