Safe to Eat Cookie Dough

Okay so I work in a highschool obviously and today the home ec class made safe to eat cookie dough. Here's the recipe I scooped from my co-worker:

Makes about 1.5 - 2 cups of cookie dough
Ingredients:
1/2 cup butter (softened)
3/4 cups brown sugar (packed)
1 cup all purpose flour
1/2 teaspoon salt
1 teaspoon vanilla extract
1 cup semisweet chocolate chips
Water
Directions:
In a medium bowl, cream together the butter and brown sugar. Stif in flour, salt, vanilla, and chocolate chips. Add water one tablespoon at a time (stirring between each) until the dough reaches cookie dough consistancy.

Yeah, you're welcome...