In a mixing bowl, combine the all-purpose flour, unsweetened Dutch cocoa powder, and powdered sugar. Whisk until well blended. In another bowl, whisk together the 1% milk, egg whites, and whole egg. Gradually pour the wet ingredients into the dry ingredients, whisking continuously until smooth. Add the oil and mix until fully incorporated.
Allow the batter to rest for at least 30 minutes at room temperature.
Spray a non-stick skillet with butter-flavored spray and heat over medium heat.
Pour about 1/4 cup of batter into the center of the skillet. Quickly tilt and swirl the pan to spread the batter evenly. Cook for 1-2 minutes, or until the edges appear set and the bottom is lightly browned. Carefully flip and cook for an additional minute. Transfer to a plate and repeat with remaining batter.
To assemble, take one crepe, add sliced strawberries and a dollop of Cool Whip, fold over, and drizzle with chocolate syrup. Repeat for remaining crepes.