Microwave Oatmeal Cookie

This Microwave Oatmeal Cookie with chocolate chips is a quick eggless oatmeal cookie for one cooked in the microwave. Ready from start to finish in under 5 minutes!

If oatmeal chocolate chip cookies are your favorite but you don’t have the time (nor energy) to make a batch, you’re in luck with this Microwave Oatmeal Cookie!

It’s an eggless oatmeal cookie for one that’s ready from prep to cook in under 5 minutes. Add chocolate chips or raisins (or chocolate covered raisins for the best of both worlds).

And it’s the perfect single serving dessert for when you want something nutty and comforting without turning on the oven (especially if it’s too hot outside to bake).

This oatmeal mug cookie is very similar to my microwave chocolate chip cookie but with quick oats added to the dough.

I also added a touch more milk to make up for the oats which absorb liquid and make the cookie a little more crumbly than my other microwave cookies.

You can also make peanut butter oatmeal chocolate chip cookies using my microwave peanut butter cookie as the base then add chocolate chips and oats to it.

Ingredients For Microwave Oatmeal Cookie

To make your eggless oatmeal chocolate chip cookie, you’ll need the following ingredients:

• Butter: Using melted butter means no mixer needed!
• Milk: Helps make the cookie a little less dry since you’re not using egg.
• Brown sugar: It isn’t oatmeal cookies without brown sugar!
• Vanilla extract:Cookies taste better with vanilla. Always.
• Flour: Brings the cookie dough together. Make sure you’re measuring flour properly by using the spoon method.
• Baking powder: Helps the cookie rise as well as a less dense texture. I tested it without baking powder and it was quite terrible.
• Salt: No bland cookie here! Not needed if using salted butter.
• Quick oats: Adds a bit of nuttiness. Use quick cooking oats as you’re only cooking them for 45-60 seconds. Do not use steel oats or those instant oatmeal packets.
• Chocolate chips: Semisweet chocolate chips are preferred, but you can also use milk or dark. You can also use raisins.

Should I add an egg yolk to my microwave oatmeal cookie?

I’ve gone back and forth with numerous rounds of testing to determine whether you need an egg yolk for your microwave cookie. After all, other recipes call for it.

Truth is, I prefer the texture without it. No egg mimicks the tender, chewy texture of a cookie albeit a little more crumbly (which satisfies your cookie craving).

I did add a little bit of milk so the cookie wasn’t so dry.

What size mug or ramekin do I need for a mug cookie?

When making a mug cookie with no egg, you need to figure out which size mug or ramekin to use.

I prefer making a ramekin cookie in my 6-ounce ramekin as it’s a pretty standard size.

But if you want to make a literal mug cookie, you can use a 12 ounce standard mug like I did with my chocolate peanut butter mug cake.

Please note if you use a different size, it’ll affect the cook time. A wider mug will need less time. A deeper mug will require more time.

Don’t know what size mug you have? Fill it to the top with water then transfer the water to a measuring cup. That will tell you how many ounces your mug will hold.

How To Make Oatmeal Cookie In The Microwave

Here’s how to make your 1 minute oatmeal cookie:

1. Whisk melted butter, milk, sugar, and vanilla until sugar is dissolved. Make sure you whisk well or the texture may be extra grainy.
2. Stir in the flour, baking powder, and salt then add the oats and chocolate chips. It should resemble a soft and slightly sticky cookie dough. Transfer to your ramekin or mug.
3. Microwave for 40 seconds or until the top is set. If it looks a little too wet on the edges, microwave another 10 seconds. Do not go over 1 minute or you will overcook it.

Your microwave oatmeal cookie recipe is best eaten 10 minutes after you make it (so you don’t burn your tongue). It will not keep well the next day.

As it cools down, your cookie will firm up. I personally prefer this as it’ll have a better cookie texture.

Why is my microwave cookie hard and dry?

Microwaves vary in wattage, so please don’t overcook your microwave cookie! Start at 40 seconds then decide if you need an extra 10 seconds.

When in doubt, it’s better to have an underbaked cookie than overdone. As you make the recipe more and more, you’ll get a better feel for how long to cook it.

Unless you have a really, really weak microwave or a super narrow mug, do not go over 1 minute.

What To Serve With Oatmeal Mug Cookie

So the whole point of making your oatmeal chocolate chip cookie in the microwave is so you can eat it right away.

However, for an extra special dessert for one you can add a scoop of vanilla ice cream on top.

Or whip up homemade whipped cream, peanut butter whipped cream, or chocolate whipped cream to serve on top.

More Ramekin Desserts

If you enjoyed this 1 minute oatmeal cookie, check out my other Ramekin Dessert Recipes including:

• Microwave Sugar Cookie
• Microwave Brownie
• Single Serve Brownie
• Air Fryer Cheesecake