These oatmeal cookie bars are soft, chewy, and loaded with chocolate chips for the perfect homemade dessert. Made with simple pantry ingredients like butter, brown sugar, oats, and vanilla, they bake into golden bars with rich flavor and a tender texture. Perfect for lunchboxes, parties, or an easy weeknight sweet, these cookie bars offer a classic taste everyone loves.

Ingredients

1 cup butter (227 g), room temperature
1 cup light brown sugar (220 g), packed
1/2 cup granulated sugar (100 g)
2 large eggs
2 teaspoons vanilla extract
1/2 teaspoon salt
1 teaspoon baking soda
1 teaspoon baking powder
1 1/2 cups all-purpose flour (188 g)
2 cups old-fashioned rolled oats (170 g)
2 cups chocolate chips (340 g), semi-sweet, milk chocolate, or a mix of both

Table of Contents

Instructions

Preheat the Oven:
Preheat your oven to 350°F (180°C). Lightly grease a 9×13-inch baking pan with nonstick spray or line it with parchment paper.
Cream Butter and Sugar:
In a large mixing bowl, beat together the butter, brown sugar, and granulated sugar until creamy and smooth.
Add Wet Ingredients:
Beat in the eggs one at a time, mixing well after each addition. Stir in the vanilla extract.
Mix Dry Ingredients:
In a separate bowl, whisk together the salt, baking soda, baking powder, flour, and rolled oats until evenly combined.
Combine and Add Chocolate Chips:
Gradually add the dry mixture to the wet ingredients, stirring until fully incorporated. Fold in the chocolate chips.
Bake:
Spread the dough evenly into the prepared pan. Bake for 25–30 minutes, or until the top is golden brown and a toothpick inserted in the center comes out clean.
Cool and Cut:
Allow to cool completely in the pan before cutting into bars.

Tips

For soft, chewy bars, avoid overbaking—they’ll continue to set as they cool.
Line your pan with parchment for easy removal and cleaner slices.
Use room-temperature butter for smoother creaming and even texture.
Chill the dough for 20–30 minutes before baking if you prefer thicker, denser bars.

Variations and Substitutions

Add-ins: Mix in 1/2 cup of chopped nuts, dried cranberries, or shredded coconut for extra texture.
Different chips: Try white chocolate, peanut butter, or butterscotch chips for a flavor twist.
Whole wheat option: Replace half the flour with whole wheat flour for a heartier texture.
Gluten-free: Substitute gluten-free all-purpose flour and certified gluten-free oats.

FAQs

Can I make these ahead of time?
Yes. They keep well at room temperature for up to 4 days or can be frozen for up to 3 months.

How do I store them?
Store in an airtight container at room temperature or refrigerate for extra chewiness.

Can I halve the recipe?
Absolutely. Bake in an 8×8-inch pan and reduce baking time slightly (about 20–25 minutes).

Serving Suggestions

Serve these oatmeal cookie bars as a quick snack, dessert, or lunchbox treat. They’re delicious with a glass of milk, coffee, or hot cocoa. Warm them slightly for a gooey, melty texture.

Why You’ll Love This Recipe

These oatmeal cookie bars combine the chewy texture of oats with the richness of chocolate chips in an easy, one-pan recipe. They’re simple to make, bake perfectly golden, and offer a nostalgic homemade flavor everyone loves. Perfect for parties, bake sales, or cozy nights in.