Preheat oven to 325 degrees F. Coat 9x13 pan with foil and a nonstick spray for easy removal.

Combine ground flax and water in small bowl. Stir to combine and set aside. After about 15 minutes, it should be gelatinous and gooey kind of like an egg.

Melt chocolate chips and applesauce over low heat, stirring. I usually set up a double boiler situation with a small amount of water boiling in a saucepan and a glass bowl on top of the pan (not touching the water) with the chocolate and applesauce in the bowl.

Off the heat, whisk in coconut sugar, flax mixture (small amounts at a time), and vanilla.

Stir in flour and salt.

Add batter to prepared baking pan and bake in preheated oven for 45 minutes, until toothpick comes out clean. Let cool completely before cutting into bars.