1 cup plain (all-purpose) flour 1 stick (1/2 cup or 110g) unsalted butter at room temperature 1/3 cup sugar 1/3 cup brown sugar 1 teaspoon vanilla extract 1/2 teaspoon salt (omit if using salted butter) 2 tablespoons milk 1/2 cup chocolate chips or chopped up candy or chocolate bars
Gather all of your ingredients. The butter needs to be at room temperature so take it out of the fridge a few hours before you use it.
Before mixing the ingredients, bake the flour to kill any germs. Dump it onto a baking tray and shake the tray to spread it out into a thin layer. Put it into the oven at 350F or 175C for 5 minutes and then leave it to cool.
Meanwhile, beat the butter and sugars in a bowl or mixer until the mixture is smooth and creamy. Your butter needs to be very soft so make sure you take it out of the fridge a few hours before doing this.
Stir in the vanilla and then add the flour, mixing until the mixture is crumbly. Add the milk, stirring to bring the mixture together to form a dough that resembles raw cookies.