Ingredients
-
1
C
unsalted butter
(softened)
-
1
C
light brown sugar
(packed)
-
1/2
C
granulated sugar
-
2
none
eggs
(room temperature)
-
1 1/2
tsp
vanilla
-
1 3/4
C
all-purpose flour
-
2
tsp
cornstarch
-
1
tsp
baking soda
-
3/4
tsp
salt
-
3/4
tsp
ground cinnamon
-
3
C
old-fashioned rolled oats
-
1 1/2
C
chocolate chips, chopped nuts, or raisins
Instructions
-
Beat butter in the bowl of a stand mixer (or using an electric beater) for about 30 seconds. Add sugars and beat until light and fluffy (pause to scrape down sides and bottom of bowl, if needed).
-
Add eggs, one at a time, beating until combined. Stir in vanilla extract.
-
In a separate bowl, whisk together flour, cornstarch, baking soda, salt, and cinnamon.
-
Gradually add flour mixture to butter mixture until completely combined. Be sure to scrape the sides and bottom of the bowl so ingredients are well-mixed.
-
Gradually stir in oats until completely combined. If using raisins or chocolate chips, stir them in at this point.
-
Chill dough in refrigerator for 30 minutes.
-
Preheat oven to 375F (190C) and prepare cookie sheets by lining with parchment paper.
-
Drop cookie by rounded 2-3 Tablespoon-sized ball onto parchment paper, spacing at least 2" apart.
-
Bake on 375F (190C) for 10-12 (edges should be slightly browned, centers may still be slightly underbaked but shouldn't be raw, they'll bake completely as they cool).
-
Allow cookies to cool completely on cookie sheet before serving and enjoying.