Oatmeal Cookie Bars

How to make hearty Oatmeal Cookie Bars!

Recipe includes video at the bottom of the post!

Course Dessert

Cuisine American

Prep Time 15

Cook Time 40

Total Time 55

Servings bars

Calories 366kcal

1 cup (226 g) butter melted
1 cup (200 g) light brown sugar tightly packed
½ cup (100 g) sugar
2 large eggs + 1 large egg yolk
1 ½ teaspoons vanilla extract
1 ¼ cup (157 g) all-purpose flour
2 teaspoons cornstarch cornflour in UK
½ teaspoon baking powder
¾ teaspoon salt
¼-½ teaspoon ground cinnamon optional
3 cups (285 g) old fashioned rolled oats
1 ½ cups (255 g) chocolate chips optional, I did a mix of semisweet chocolate chips, milk chocolate chips, and butterscotch chips

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.
1 cup (226 g) butter, 1 cup (200 g) light brown sugar, ½ cup (100 g) sugar
Add eggs and vanilla extract and stir well.
2 large eggs + 1 large egg yolk, 1 ½ teaspoons vanilla extract
In a separate bowl, whisk together flour, cornstarch, baking powder, salt, and cinnamon (if using).
1 ¼ cup (157 g) all-purpose flour, 2 teaspoons cornstarch, ½ teaspoon baking powder, ¾ teaspoon salt, ¼-½ teaspoon ground cinnamon
Gradually add dry ingredients to wet until completely combined.
Add oats and chocolate chips and stir until well combined.
3 cups (285 g) old fashioned rolled oats, 1 ½ cups (255 g) chocolate chips
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.