Oatmeal Chocolate Chip Cookies (High Altitude Tested, Never Flat)

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Soft, chewy oatmeal chocolate chip cookies that hold their shape at any elevation. This recipe includes the exact high altitude adjustments I use at 7,053 ft so yours never turn out flat.

These oatmeal chocolate chip cookies are the ones I’ve made more than any other recipe in my kitchen. Buttery edges, a chewy middle, and enough chocolate chips that nobody’s counting. And if you’re baking up here at 7,053 ft with me, I’ve got the adjustments built right in so you’re not left guessing why your cookies spread into one giant cookie pancake (we’ve all been there).

This is also the recipe I grew up on. I’ve tried plenty of other chocolate chip cookie recipes over the years, and none of them have ever come close — this one’s tried and tested, and it’s the only one I make anymore. (If you want something even more chocolate-forward, my Chocolate Chocolate Chip Cookies are a good one to keep in your back pocket too — but this is the one on repeat in my house.)

These come together with a stand mixer or just a bowl and a wooden spoon — no fancy equipment required. That’s kind of the whole point around here: real ingredients, no 37-step process.

If you want to see the exact baking sheets and cookie scoop I use for these, my full kitchen lineup is on my Amazon storefront.

Ingredients You’ll Need

• 1 cup butter, softened
• 1 cup granulated sugar
• 1 cup brown sugar (I make my own — here’s my homemade brown sugar recipe if you want to try it – super quick and easy – promise!)
• 2 large eggs
• 1 tsp vanilla extract (I use my homemade vanilla extract for these — it makes a noticeable difference)
• 2 cups all-purpose flour (+2 Tbsp for high altitude)
• 2 1/2 cups oatmeal, old-fashioned or sprouted (not steel-cut) (I use the same sprouted oats here that I use in my Old-Fashioned Date Bars)
• 1/2 tsp salt
• 1 tsp baking powder
• 1 tsp baking soda (3/4 tsp for high altitude)
• 2 cups semi-sweet chocolate chips
• Maldon salt, for sprinkling (optional but so good)

Why This Recipe Works

• Creaming the butter and sugars properly builds air into the dough, which is what gives you a chewy center instead of a dense, cakey cookie.
• A mix of old-fashioned oats and all-purpose flour gives you structure and chew without the cookie turning gummy.
• Underbaking slightly — pulling the cookies while the centers still look soft — is the difference between a chewy cookie and a dry one. They keep cooking on the hot pan after they come out of the oven.
• Real butter and real vanilla (not extract blends) give you a rounder, richer flavor that artificial versions can’t fake.
• If you love this soft, chewy texture, you’ll also want to try my Chocolate Chip Zucchini Cookies — same chewy bite, with a sneaky vegetable folded in.

How to Make Oatmeal Chocolate Chip Cookies

Cream the Butter and Sugars In your stand mixer (or a large bowl by hand), beat the softened butter, granulated sugar, and brown sugar together until light and fluffy, about 2-3 minutes. This step matters — it’s what gives you that soft, chewy texture instead of a dense cookie.

Add the Eggs and Vanilla Mix in the eggs one at a time, then add the vanilla. Beat just until combined.

Bring in the Dry Ingredients Add the flour, oatmeal, salt, baking powder, and baking soda. Mix on low speed just until the dough comes together — overmixing here is what makes cookies tough, so stop as soon as you don’t see dry streaks.

Fold in the Chocolate Chips Add the chocolate chips and mix or fold them in by hand so they’re evenly distributed.

Chill the Dough (High Altitude Step) At 7,053 ft, I always chill this dough for at least 30 minutes before baking. Our dry air means the dough is softer and warms up faster, which leads to flat, greasy cookies if you skip this. If you’re closer to sea level, this step is optional.

Scoop and Bake Using a 4 Tbsp cookie scoop (or a scant 1/4 cup), portion the dough onto a parchment-lined cookie sheet, leaving a couple inches between each for spreading. Sprinkle with maldon salt if using. Bake at 375°F (385°F for high altitude) for 10-12 minutes, until the edges are golden and the centers still look slightly underdone — they’ll finish setting up as they cool on the pan.

Cool and Serve Let the cookies rest on the baking sheet for 5 minutes before moving them to a wire rack. This recipe makes about 18 cookies.

Tips for the Best Oatmeal Chocolate Chip Cookies

These apply no matter where you’re baking:

• Don’t skip softening the butter. It should give slightly when pressed but not be greasy or melty — too warm and your cookies will spread flat regardless of altitude.
• Measure your flour correctly. Spoon it into the measuring cup and level it off rather than scooping directly from the bag — scooping packs in extra flour and gives you a drier cookie.
• Use a cookie scoop for even baking. Uniform size means every cookie finishes baking at the same time.
• Let the pan cool between batches. Scooping dough onto a hot pan will cause it to spread before it even hits the oven.

High Altitude Baking Tips

Baking at 7,053 ft changes more than people expect, and cookies are one of the trickiest to get right. Here’s what I do differently up here:

• Add 2 tablespoons more flour to help the dough hold its shape instead of spreading thin.
• Chill the dough for at least 30 minutes. Lower air pressure and faster evaporation mean warm dough spreads fast — chilled dough holds together and gives you that thick, bakery-style cookie.
• Bump the oven temperature up by about 10 degrees (375°F to 385°F). The dry air pulls moisture out of your bake faster, so a slightly higher temp helps set the structure before the cookie over-spreads.
• Cut the baking soda back slightly (1 tsp to 3/4 tsp). Leavening reacts faster at high altitude, so a little less keeps the cookies from puffing up and then collapsing flat.
• Watch the bake time, don’t just trust the clock. High altitude ovens tend to bake faster on the outside while the center catches up — pull cookies when the edges are golden, even if that’s a minute or two under 12 minutes.

More Cookie Recipes You’ll Love

If this one hits the spot, here are a few more from the cookie archives worth trying:

• The Best Chocolate Chocolate Chip Cookies — for when you want a deeper, more chocolate-forward cookie
• Old-Fashioned Natchez Cookies — graham cracker toffee bars with pecans and chocolate chips
• Pineapple Pecan Cookies — a fun tropical twist if you want something different
• Browse all cookie recipes for more

Final Thoughts

These oatmeal chocolate chip cookies are the kind of recipe you’ll want to keep on repeat — simple ingredients, no fuss, and a cookie that actually holds up whether you’re at sea level or up here at 7,053 ft. If you make these, I’d love to know how they turned out — leave a comment below, watch the full video walkthrough on YouTube, and if you’re not already following along on Instagram or Facebook, come say hi. That’s usually where the real-time kitchen chaos happens.