Position an oven rack in the center of the oven and preheat the oven to 400F degrees.
Lightly coat 2 cookie sheets with nonstick cooking spray or line them with silicone liners.
In a large bowl, mix together the sugar, butter and vanilla. Add the egg whites, flour and oat bran and stir just until everything is incorporated. The mixture will be lightly liquid.
Spoon the batter onto the cookie sheets, dividing it into 18 equal portions. Spread each portion out very thinly and ignoring small holes to form a 3-3/4" to 4"-inch round. (Rotating the cookie sheet helps to spread them out more easily.)
Bake for 10 to 12 minutes, until the wafers are well browned.
Remove the wafers from the cookie sheets while still warm and cool them on a wire rack.1
Notes
Serving size: 1 oat bran butter waferWW Points: 2Check the WW Points for this recipe and track it in the WW app. (Must be logged into WW on a smartphone or tablet.)2SmartPoints (Green plan)2SmartPoints (Blue plan)2SmartPoints (Purple plan)1PointsPlus (Old plan)The recipe specifies using oat bran, not oat flakes or rolled oats.You can leave your cookies flat, which is what I did, or shape them into cones or cups when warm from the oven, if you want fancier cookies.