Preheat oven to 350 degrees.

Mix well:

1 c. Hellmann's mayonnaise
1 c. white sugar

(This appears to be a secret ingredients - DO NOT SUBSTITUTE another brand.)

Add:

1 tsp. vanilla
2 c. flour
1/2 tsp. baking soda
1/2 tsp. salt

Roll into balls and press down. Bake 8 minutes at 350 degrees. You can use color sprinkles to top with for the holidays.