Preheat oven to 375 degrees.
In a mixing bowl mix flour and powdered sugar together. Set aside.
In a large mixing bowl add egg whites, cream of tartar, and beat on medium setting until light and foamy.
Reserve two tablespoons of granulated sugar.
Next, beat in on a high setting, a few tablespoons at a time of granulated sugar until all of the sugar has been added. Continue beating until the meringue is stiff and shiny.
With the reserved two tablespoons of granulated sugar also add salt, vanilla, and almond extract. Continue beating until the meringue is stiff and shiny.
Begin folding in the flour-sugar mixture. I will sprinkle about 1/3 cup at a time. Once it blends in and disappears you can add another 1/3 cup until all of the mixture has been folded in. Do not over-work.
It will be easiest to push batter into your un-greased loaf pan. Bake until the top springs back after touching or inserting a wooden toothpick and it is clean once removed.
You will need to invert the pan. I set mine onto two mason jars placing one handle onto each jar. All to cool completely.
Once cooled run a knife around the edges, you may need to do this more than once. Be patient, it'll slip out.