Please choose the correct ending to complete the given sentence: Food and Entertaining: [header] How to make edible chocolate chip cookie dough [title] Combine the butter, brown sugar, vanilla, and salt. [step] In a large bowl pour the softened butter, brown sugar, vanilla extract, and salt. Use a spatula or mixer to combine them thoroughly.

Ending1: [title] Cut the dough into small sized pieces. [step] Find an ungreased , 1 ½-inch (3.81-centimeter) circle and use a rolling pin to carefully cut it into small pieces. Ending2: [title] Pour the one tablespoon of milk in and stir again. [step] Then add the flour, only adding one tablespoon at a time, while mixing properly. Ending3: Continue beating until the mixture is mostly smooth and there are no lumps. [substeps] You can use cooking spray to prevent the mixture from sticking to your work surface. Ending4: [title] Beat in the chocolate chips and egg yolks one at a time until soft. [step] Use a fork to beat them into the batter until smooth.

Answer format: ending1/ending2/ending3/ending4