Preheat oven to 350°F. Spray a 13x9-inch pan with nonstick spray.
PREPARE THE BROWNIES:
In a mixing bowl, whisk together the flour, sugar and salt. Add the butter, eggs, orange extract and orange zest and beat with hand mixer until well-blended. Pour the batter into the prepared pan and bake for 30 minutes, or until light golden brown and set. Remove from oven and pierce the top of entire cake with a skewer or a fork.
PREPARE THE GLAZE:
Combine all of the glaze ingredients in a bowl, stirring until smooth. Add more juice, if needed to create a pouring consistency. Pour the glaze over the cake. Cool the cake and cut into 24 squares.
Notes
Do you have to use the orange extract? Yep... if you want the super-orangey flavor that is supposed to come out in these brownies to really show up, you'll need the orange extract. You can pick up a good orange extract that doesn't have that *artificial* flavor at Whole Foods, or you can find orange oil at baking/cooking supply stores.