Preheat oven to 350F.
Add 3 tablespoons butter to bowl
Add 3 tablespoons brown sugar to bowl
Add 1 tablespoon granulated or white sugar to bowl
Bring bowl to counter
Use Electric mixer (on the lowest setting) to mix until it is fluffy.
Add 1 egg yolk to bowl
Add 1/4 tablespoon vanilla extract to bowl
Using a fork mix until well combined (about 2 minutes), scraping down the sides of the bowl as needed.
Add 1/3 cup all-purpose flour to bowl
Add 1/4 Teaspoon baking soda to bowl
Add 1/2 cup oats to bowl
Add 1/2 cup of chocolate chips to bowl
Add pinch of salt to bowl
Mix all ingredients together using your hands or mixer
Shape cookies on cookie sheet, about 4-6 cookies
Put cookies in oven and bake for 9-10 minutes
If cookies are still gooey, add another minute and check.
Turn off oven once cookies are done and removed
Let cool for a few minutes, and enjoy!