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Single-Serve Vegan Oatmeal Cookie in a Mug

Oatmeal Cookie in a Mug with only 5 ingredients needed! This easy single-serve dessert recipe requires 5 minutes and no baking.

4-Ingredient Oatmeal Cookie in a Mug with a bite taken out

You know where this is going.

It’s a Friday night, you’re ultra pumped about how hard you sweated in hot pilates class this week, you can feel an aching in your bones for something sweet and oatmeal-esque but you don’t want a full batch of cookies lurking around your counter space, you then…

Bake a single-serve oatmeal cookie in a mug.

This one is gluten-free, dairy-free, studded with chocolate chips, and has that amazing oatmeal flavor. 

Plus it’s ready in less than 5 minutes…not shabby for those times you have a hankering for a little something luscious.

Let’s make it!

Add the gluten-free flour, coconut sugar, baking soda, oats, coconut oil, water, and sea salt to a mug or measuring cup and stir well until a thick dough forms.

Ingredients for oatmeal cookie in a measuring cup

Stir in the chocolate chips (if adding).

Oatmeal cookie ingredients in a mug with chocolate chips

Microwave on high 40 to 60 seconds, until cookie has set up.

Dive in with a spoon and enjoy!

Baking Instructions:

If you don’t own or operate a microwave, no problem! Simply stir up all of the ingredients in a mug, place the mug on a cookie sheet, and bake at 350 degrees F (preheated) for 25 to 30 minutes. Allow the mug to cool before diving in!!

That single-serve dessert life!

More Single-Serve Desserts in a Mug:

My cookbook, Paleo Power Bowls, is now available! CLICK HERE to check it out. Thank you for your support!

If you make this recipe, please feel free to share a photo and tag @The.Roasted.Root on Instagram!

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4.45 from 58 votes

Oatmeal Cookie in a Mug

Gluten-free oatmeal cookie in a mug with chocolate chips – made with only a few basic ingredients. Vegan!
Prep Time5 minutes
Cook Time1 minute
Total Time6 minutes
Course: Single-Serve Desserts
Cuisine: American
Servings: 1 mug cookie
Calories: 796kcal
Author: Julia


Optional Add-ins


  • Add all ingredients in the order in which they appear to a microwave-safe mug or measuring cup. Stir in the chocolate chips (if adding).
  • Microwave on high 40 to 60 seconds, until cookie has set up.


Serving: 1cookie | Calories: 796kcal | Carbohydrates: 78g | Protein: 3g | Fat: 54g | Fiber: 2g | Sugar: 45g
Single-Serve Oatmeal Cookie in a Mug - gluten-free, refined sugar-free, dairy-free, vegan, egg-free

Recipe Rating

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Sunday 10th of September 2023

This didn’t set. I suspect that there is an error in the amount of coconut oil stated in your recipe… ?? 4 TBSP is an awful lot for a single serving. Should it be tsp instead?


Monday 31st of July 2023

Taste is kinda ok but its wayyyyy too greasy. I even had to remove excess oil with a tissue. Followed exact recipe once or twice and always same result.


Wednesday 8th of March 2023

Wonderful! It didn’t quite hold together, but it made a delicious “plate” for a scoop of ice cream! Next time I’ll use less sugar — a bit too sweet with chocolate chips added.


Saturday 3rd of December 2022

I followed this recipe exactly and it did not turn out at all. It was like oatmeal soup


Wednesday 7th of December 2022

Hi Alicia! Did you make any changes to the recipe?


Sunday 20th of November 2022

Not to nitpick but….The first paragraph states Only 4 ingredients yet I count 7 when I read the recipe?


Monday 21st of November 2022

Hi there! Thanks for catching that! Water and salt are generally not counted as ingredients, and the vanilla extract and chocolate chips are optional. I realized I updated the post to include baking soda after publishing it the first time, as I found the recipe turned out better with it. So indeed, the recipe is five ingredients, not four. 🙂 Appreciate you bringing that to my attention! xo

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