Chewy Gluten-Free Oatmeal Chocolate Chip Cookie Bars

Thick and chewy, Gluten-free Oatmeal Chocolate Chip Cookie Bars give you everything you love about a chocolate chip cookie in an easy, portable bar. Perfect for road trips, picnics, and potlucks.

A batch of Gluten-free Oatmeal Chocolate Chip Bars cut into squares.

Why You’ll Love This Recipe

These gluten-free oatmeal chocolate chip bars are thick, satisfyingly chewy, and packed with oats and plenty of chocolate. They reproduce the familiar flavor and texture of a classic chocolate chip cookie but are faster and less fussy to make because they bake in a single pan. The bars hold together well, travel easily, and stay fresh for days when stored properly, making them ideal for snacks, lunchboxes, camping trips, or a simple dessert at home.

Because they’re prepared in a square pan, the recipe is especially convenient when you need to feed a crowd or want to save time in the kitchen. The oat content adds a pleasant chew and heartiness, while semi-sweet chocolate chips deliver melty pockets of chocolate in every bite.

Ingredients & Substitutions

Ingredients for the bar cookies measured out in bowls.
  • Gluten-free flour blend: Use a 1:1 gluten-free baking flour that already contains xanthan gum or another binder.
  • Butter: For dairy-free, substitute a plant-based buttery stick (measure as listed).
  • Oats: Choose certified gluten-free rolled oats to avoid cross-contamination.
  • Chocolate chips: Semi-sweet chips provide balance; use dairy-free chips if needed for a vegan or dairy-free version.

Easy to Make

Steps to mixing the chocolate chip bars, creaming sugars and butter, adding dry ingredients, blending in oats and chocolate chips.

The method is straightforward: cream the butter and sugars, add the egg and vanilla, fold in the dry ingredients, then stir in oats and chocolate chips. Press the dough into a lined 9-inch square pan, top with a few extra chips if you like, and bake until golden. Cooling fully before slicing gives the best texture.

  • Cream butter and sugars until light and fluffy.
  • Mix in the egg, egg yolk, and vanilla.
  • Whisk the dry ingredients and combine with the wet mixture.
  • Fold in gluten-free rolled oats and chocolate chips.
  • Spread evenly in a parchment-lined 9-inch square pan, top with extra chips if desired, and bake.
A collage showing: spreading the cookie dough into a parchment lined square blue pan, sprinkling with extra chocolate chips, the final baked cookie, then cut into squares.

Expert Tips

  • Cool the bars completely in the pan before cutting. Warm bars are softer and more likely to crumble; cooling helps them set and slice neatly.
  • If you need a larger batch, double the recipe and bake in a 9×13-inch pan—adjust baking time as needed and watch for golden edges.
  • Store bars at room temperature in an airtight container for up to three days. For longer storage, freeze individual squares wrapped well for up to 1–2 months.
  • Texture note: using quick oats will yield a slightly softer bar; rolled oats give more chew and structure.
Bars sliced into squares showing the chocolate chips on the inside.

Recipe

A batch of Gluten-free Oatmeal Chocolate Chip Bars cut into squares.

Gluten-free Oatmeal Chocolate Chip Bars

Thick, chewy, and loaded with oats and chocolate chips. These bars are a speedy alternative to drop cookies and are ideal for sharing or packing for travel.
Servings: 16 bars
Prep Time: 20 mins
Cook Time: 30 mins
Total Time: 50 mins

Ingredients

  • ½ cup butter, softened
  • ¾ cup brown sugar
  • ¼ cup granulated sugar
  • 1 egg
  • 1 egg yolk
  • ½ teaspoon vanilla extract
  • 1 cup gluten-free flour blend (1:1 blend with xanthan gum)
  • 1 teaspoon baking powder
  • ¼ teaspoon salt
  • 1 cup gluten-free rolled oats
  • 1 cup semi-sweet chocolate chips (plus extra for sprinkling)

Instructions

  1. Preheat the oven to 375°F (190°C). Line a 9-inch square pan with parchment paper and lightly grease the pan.
  2. Cream the softened butter with the brown and granulated sugars until the mixture is light and smooth.
  3. Beat in the egg, egg yolk, and vanilla until evenly combined.
  4. Whisk together the gluten-free flour, baking powder, and salt. Gradually blend the dry mixture into the creamed wet ingredients.
  5. Fold in the rolled oats and chocolate chips until just combined.
  6. Spread the dough evenly into the prepared pan. Sprinkle a few extra chocolate chips on top and gently press them into the surface.
  7. Bake at 375°F for 25–30 minutes, until the top is golden brown and a toothpick inserted in the center comes out clean.
  8. Allow the bars to cool completely in the pan before lifting out with the parchment and cutting into squares.

Notes

  • Cooling is essential: slicing too soon can result in crumbling. Let the bars set fully for clean squares.
  • A 9×13-inch pan can be used if you double the recipe; expect a shorter baking time per thickness—watch for golden edges and a set center.
  • These bars keep well at room temperature for up to three days; for longer storage, freeze tightly wrapped squares.

Estimated Nutrition (per bar)

Calories: 219 kcal | Carbohydrates: 28 g | Protein: 3 g | Fat: 11 g | Fiber: 2 g | Sugar: 18 g

Note: Nutrition values are estimates and provided for informational purposes only.

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