Place the flour in a medium mixing bowl.
Slowly pour in the Seltzer Water while whisking the mixture with a whisk.
Whisk until well combined.
Set aside and let stand 10 to 15 minutes.
Lightly grease a large nonstick frying pan, or a crepe pan, with cooking spray and set over medium heat.
Add 1/3-cup batter to the pan and swirl to completely cover the bottom.
Cook until edges of crepe curl-up and underside of crepe is golden brown; about 2 to 3 minutes.
Flip the crepe and continue to cook for 45 seconds to 1 minute, or until lightly browned.
Remove crepe from pan and repeat with remaining batter.
Lightly coat pan with cooking spray in between each crepe.
Keep crepes covered.
Fill the Crepes with your choice of filling(s).