Preheat oven to 425 °F, prepare 12 muffin tin, line it with muffin cup.
In a mixing bowl, beat egg and sugar until fluffy, add oil, vanilla extract and milk, beat it.
Bake it in the oven for 5 minutes then turn the oven down to 350 °F without opening the oven door.
Do you make this Easy Chocolate Chip Muffins? Take a picture of your delicious cookies, hashtag #craftyforhome, or you can tag @craftyforhome on Instagram.