Preheat oven to 375°
Combine flour, baking soda, cinnamon, and oats in a bowl and set aside.
Using a hand-held or standing mixer, beat together softened butter and sugar until creamy.
Add in eggs, blending in one at a time.
Pour in vanilla extract
Add flour mixture into the wet ingredients, blending until well combined. Your batter will be sticky
Using a wooden spoon or spatula, stir in your oats until well incorporated.
Feel free to add in raisins or chocolate chips as you like!
Using a cookie scooper or a spoon, place about a tablespoon of cookie dough onto your lined baking sheet leaving ample room for spreading.
Bake for 8-10 minutes.
Enjoy your crispy-edged oatmeal cookies with their soft and gooey center!