Use a funnel to pour the flour into the quart-sized mason jar. Gently knock down and press the first layer of flour with a spoon or spatula.
Continue adding the rest of the dry ingredients layer by layer as they are listed in the recipe, gently pressing each subsequent layer so the ingredients all fit in the jar.
Seal the jar with a lid and decorate with twin, ribbon, or tags.
To Make the Cookies
Preheat the oven to 350° Fahrenheit (176° Celsius).
In a large mixing bowl, use a hand mixer to cream together the softened butter, vanilla extract, and egg.
In a separate mixing bowl, pour the ingredients from the jar and stir them thoroughly.
Combine the dry ingredients with the wet ingredients and mix until well incorporated.
Use a cookie scoop to make 1 1/2 tablespoon-sized cookie balls on a lightly greased cookie sheet. Be sure to leave room between each cookie to account for expansion.
Bake for 10 to 12 minutes until the edges are slightly browned. Remove from the oven and let cool on the pan for a few minutes before serving. *
*My funnel was too small - I found that if I folded a paper towel into a general funnel shape that I was able to pour the ingredients in the jar without a fuss. *These cookies are easy to over bake. The middles will look doughy and soft when you pull them from the oven. Just let the residual heat from the pan do the rest of the cooking for you.
Keyword Chocolate Chip Cookies, Cookie Jar, Cookie Mix Jar, Oatmeal Chocolate Chip Cookies, Oatmeal Chocolate Chip Cookies in a Jar