Oatmeal cookie bars

Oatmeal Cookie Bars

How to make hearty Oatmeal Cookie Bars!
Recipe includes video at the bottom of the post!
Course Dessert
Cuisine American
Keyword bar cookies, cookie bars, easy dessert, oatmeal cookies, oatmeal desserts
Prep Time 15 minutes
Cook Time 40 minutes
Total Time 55 minutes
Servings 16 bars
Calories 375kcal
Author Sam Merritt


  • 1 cup butter melted (226g)
  • 1 cup light brown sugar tightly packed (200g)
  • 1/2 cup sugar 100g
  • 2 large eggs + 1 large egg yolk
  • 1 1/2 teaspoons vanilla extract
  • 1 1/4 cup all-purpose flour 157g
  • 2 teaspoons cornstarch cornflour in UK
  • ½ teaspoon baking powder
  • 3/4 teaspoon salt
  • 1/4-1/2 teaspoon ground cinnamon optional
  • 3 cups old fashioned rolled oats 285g
  • 1 1/2 cups chocolate chips optional, I did a mix of semisweet chocolate chips, milk chocolate chips, and butterscotch chips (255g)


  • Preheat oven to 350F (175C) and line a 9x9 metal baking pan with parchment paper or grease and flour the sides and bottom of the pan.*
  • Combine butter and sugars in a large bowl and stir until well-combined.
  • Add eggs and vanilla extract and stir well.
  • In a separate bowl, whisk together flour, cornstarch, baking powder, salt, and cinnamon (if using).
  • Gradually add dry ingredients to wet until completely combined.
  • Add oats and chocolate chips and stir until well combined.
  • Spread cookie dough evenly into prepared baking pan and bake on 350F (175C) for 35-40 minutes or until a toothpick inserted in the center comes out clean or with a few moist crumbs.



*A glass baking pan will work for this recipe instead but it will likely take longer to bake.


Serving: 1bar | Calories: 375kcal