Preheat oven to 350. Combine the butter and both sugars in a bowl. Mix until smooth. Add the egg and vanilla and mix until combined. Add the flour, salt, and baking soda and mix until just combined.
Take a small piece of dough and roll it into your hands to make a ball. Continue with all the dough. Once you’ve filled a baking sheet, put them in the oven and bake for 9-12 minutes, until golden brown. Let the lil cookies cool for 10 minutes, then pour them into a bowl.
To make the blood milk, add a couple drops of red food coloring to a cup of milk and stir it in. Pour over the cookies and enjoy!!
