If you’re in search of a cookie that perfectly balances chewiness and richness, look no further than these One Bowl Oatmeal Chocolate Chunk Cookies. They are a delightful combination of wholesome oats and decadent dark chocolate, all made in just one bowl. Whether you’re baking for a gathering or simply treating yourself, these cookies will surely satisfy your sweet tooth.
Why It’s Crowd-Pleasing

These One Bowl Oatmeal Chocolate Chunk Cookies are the ultimate comfort food. The warm, gooey chunks of dark chocolate meld beautifully with the hearty oats, creating a cookie that’s both satisfying and indulgent. The cinnamon adds a warm, inviting aroma that makes the kitchen feel like home. Plus, making them in one bowl means less cleanup—perfect for busy bakers or anyone who likes to keep things simple.
What’s in the Bowl
To create these delicious cookies, you’ll need the following ingredients:
- 1 cup (1 stick) unsalted butter, at room temperature
- 1 cup packed light brown sugar
- 1 cup granulated white sugar
- 1 large egg
- 1 large egg yolk
- 2 teaspoons ground cinnamon
- 1 teaspoon vanilla extract
- 1 teaspoon baking soda
- 1/2 teaspoon salt
- 1 1/2 cups all-purpose flour
- 1 cup rolled oats
- 3 ounces dark chocolate, chopped
Setup & Equipment
Before you start baking, gather these essential tools:
- Mixing bowl: A large bowl for combining your ingredients.
- Measuring cups and spoons: For accurate ingredient measurements.
- Spatula: For mixing and scraping down the sides of the bowl.
- Baking sheet: To hold the cookies while they bake.
- Parchment paper: Optional, but helps prevent sticking.
- Oven: Preheated to 350°F (175°C).
One Bowl Oatmeal Chocolate Chunk Cookies in Steps

Step 1: Cream the Butter and Sugars
In your mixing bowl, combine the room temperature unsalted butter, packed light brown sugar, and granulated white sugar. Use a spatula or a mixer to blend them together until the mixture is smooth and creamy.
Step 2: Add the Egg and Yolk
Next, add the large egg and egg yolk to the butter-sugar mixture. Mix until well incorporated, ensuring a silky texture.
Step 3: Incorporate the Flavors
Stir in the ground cinnamon and vanilla extract. The sweet and spicy aroma will begin to fill your kitchen—what a treat!
Step 4: Mix in the Dry Ingredients
Sprinkle the baking soda and salt over the mixture, and then add the all-purpose flour and rolled oats. Mix until just combined, being careful not to overmix.
Step 5: Fold in the Chocolate
Finally, fold in the chopped dark chocolate. This is where the magic happens as you create pockets of melted chocolate in your cookies.
Step 6: Scoop and Bake
Using a spoon or cookie scoop, drop rounded tablespoons of the dough onto a baking sheet lined with parchment paper. Leave some space between each cookie as they will spread while baking.
Step 7: Bake and Cool
Bake the cookies in your preheated oven for about 10-12 minutes, or until the edges are lightly golden. Allow them to cool on the baking sheet for a few minutes before transferring them to a wire rack to cool completely.
Holiday & Seasonal Touches

Want to make these cookies even more festive? Consider these seasonal adaptations:
- Add nuts: Chopped walnuts or pecans can add a delightful crunch.
- Include dried fruit: Dried cranberries or cherries for a tart contrast.
- Make them festive: Add festive sprinkles or holiday-themed chocolate chunks for a fun touch.
- Spice it up: Experiment with pumpkin spice in the fall for a seasonal twist.
Frequent Missteps to Avoid
When baking these One Bowl Oatmeal Chocolate Chunk Cookies, keep these tips in mind:
- Room temperature butter: Ensure your butter is at room temperature for easy creaming. Cold butter will not incorporate well.
- Don’t overmix: Overmixing the dough can lead to tough cookies. Mix until just combined.
- Measure accurately: Be precise with your ingredient measurements for the best results.
- Cool the cookies properly: Letting cookies cool on the baking sheet for too long can cause them to become overly soft.
Storage & Reheat Guide
To keep your One Bowl Oatmeal Chocolate Chunk Cookies fresh:
- Room temperature: Store in an airtight container for up to one week.
- Freezing: Freeze the cookie dough or baked cookies in a freezer-safe bag for up to three months.
- Reheating: Warm in the microwave for about 10-15 seconds for that freshly-baked taste.
One Bowl Oatmeal Chocolate Chunk Cookies Q&A
Can I use quick oats instead of rolled oats?
Yes, you can use quick oats, but the texture will be slightly different. Rolled oats provide a chewier texture, while quick oats will result in a softer cookie.
What can I substitute for dark chocolate?
If you prefer a sweeter taste, you can use semi-sweet chocolate or milk chocolate. Just keep in mind that it will change the flavor profile.
Can I make these cookies gluten-free?
Absolutely! Substitute the all-purpose flour with a gluten-free all-purpose blend. Ensure that the oats are certified gluten-free as well.
How do I know when the cookies are done baking?
The cookies are done when the edges are lightly golden, and the centers look a little underbaked. They will continue to firm up as they cool.
If you enjoyed these cookies, check out more delicious recipes:
The Takeaway
These One Bowl Oatmeal Chocolate Chunk Cookies are not only easy to make but also incredibly satisfying. The rich chocolate combined with hearty oats creates a delightful treat that is perfect for any occasion. With just one bowl to clean up, you can bake without the fuss. So, gather your ingredients, preheat your oven, and get ready to experience cookie bliss! Enjoy every bite of this warm, chewy, and utterly delicious cookie.

One Bowl Oatmeal Chocolate Chunk Cookies
Equipment
- Mixing Bowl
- Measuring cups and spoons
- Spatula
- Baking Sheet
- Parchment Paper
- Oven
Ingredients
- 1 cup unsalted butter at room temperature (1 stick)
- 1 cup packed light brown sugar
- 1 cup granulated white sugar
- 1 large egg
- 1 large egg yolk
- 2 teaspoons ground cinnamon
- 1 teaspoon vanilla extract
- 1 teaspoon baking soda
- 0.5 teaspoon salt
- 1.5 cups all-purpose flour
- 1 cup rolled oats
- 3 ounces dark chocolate chopped
Instructions
One Bowl Oatmeal Chocolate Chunk Cookies in Steps
- In your mixing bowl, combine the room temperature unsalted butter, packed light brown sugar, and granulated white sugar. Use a spatula or a mixer to blend them together until the mixture is smooth and creamy.
- Add the large egg and egg yolk to the butter-sugar mixture. Mix until well incorporated, ensuring a silky texture.
- Stir in the ground cinnamon and vanilla extract. The sweet and spicy aroma will begin to fill your kitchen—what a treat!
- Sprinkle the baking soda and salt over the mixture, then add the all-purpose flour and rolled oats. Mix until just combined, being careful not to overmix.
- Fold in the chopped dark chocolate. This is where the magic happens as you create pockets of melted chocolate in your cookies.
- Using a spoon or cookie scoop, drop rounded tablespoons of the dough onto a baking sheet lined with parchment paper. Leave some space between each cookie as they will spread while baking.
- Bake the cookies in your preheated oven at 350°F (175°C) for about 10-12 minutes, or until the edges are lightly golden. Allow them to cool on the baking sheet for a few minutes before transferring them to a wire rack to cool completely.
Notes
- Ensure the butter is at room temperature for easy creaming and the best texture.
- Do not overmix the dough to avoid tough cookies; mix just until combined.
- Store cookies in an airtight container at room temperature for up to one week or freeze for up to three months.
