In a medium sized bowl, combine egg whites, sugar, and flour until well combined.

Add butter, vanilla, cinnamon, and water and stir until combined.

Drop about 1-1.5 Tbsp batter onto cookie sheet. Use a spatula to carefully spread the batter into a circle about 5" wide. (Only bake 2-3 cookies at a time as you will need to move quickly to shape them before they cool and harden.)

Bake at 350 for 8-10 minutes or until cookies begin to turn golden on the edges.

Working quickly, remove the cookie sheet from the oven and sprinkle a small amount of granulated sugar on top of each cookie. Then use a spatula to flip the cookie onto the base of an upside-down drinking glass and carefully press the edges down lightly around the glass.

Allow these 2-3 cookies to cool on the glasses while repeating the process with more batter.

Once cool, carefully lift the cookie off the glass. Repeat process until all batter has been used.