2 Minute Blueberry Crisp in a Mug
This easy Blueberry Crisp in a Mug is a warm and delicious single-serving dessert made with just 4 ingredients. Ready in about 2 minutes in the microwave, it's perfect when you want a quick blueberry crisp without turning on the oven. Use fresh or frozen berries to enjoy it any time of year.
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Featured Review:
"I'm impressed with how quick, easy & yummy this turned out!"
- Coppelia, 5-star review
What I Love About This Blueberry Crisp
It's summertime as I write this, and here in the Pacific Northwest, blueberries and other berries are abundant. But one of the beauties of this incredibly simple dessert is that you don't have to wait for berry season. Fresh or frozen blueberries work beautifully, making this warm and comforting crisp an easy treat any time of year.
How do you make blueberry crisp in a mug?
To make a microwave blueberry crisp, fill a microwave-safe mug with fresh or frozen blueberries, add the oat topping, and microwave for about 2 minutes, or until the berries are hot and bubbling.
The result is a quick, single-serving blueberry crumble you can enjoy straight from the mug-preferably with a scoop of vanilla ice cream.
Blueberry Crisp in a Mug Tips
- Choose a microwave-safe mug: I prefer a shorter, broader mug because it gives the topping more surface area, but any microwave-safe mug will work.
- Fill it generously: Blueberries shrink as they cook, so add enough to nearly fill the mug without allowing it to overflow.
- Choose a complementary oatmeal flavor: Maple brown sugar or cinnamon spice instant oatmeal pairs especially well with blueberries.
The oatmeal topping will not have exactly the same texture as an [oven-baked berry crisp], but it is warm, sweet, and slightly crunchy. Some of the topping may settle among the berries, creating a delicious blueberry sauce at the bottom of the mug.
Can I use frozen blueberries?
Yes. Fresh or frozen blueberries both work well in this microwave crisp. There is no need to thaw frozen berries first, although they may need a little additional microwave time to become hot and bubbly.
More Quick and Easy Desserts
For another fruit-filled microwave dessert, try my Apple Crisp in a Mug. You might also enjoy this Microwave Bread Pudding, Carrot Cake in a Mug, or my Quick Skillet Blueberry Cobbler.
2 Minute Blueberry Crisp in a Mug
Ingredients
- ½ packet of flavored instant oatmeal
- 1 tablespoon butter melted
- ¾ cup blueberries fresh or frozen
- ½ teaspoon cornstarch see note
Instructions
- In a small bowl with a fork, mix the instant oatmeal and melted butter until it resembles a crumble topping.
- Add the fresh or frozen blueberries (if using frozen see note!) to the mug; toss with cornstarch if using. I like to fill my mug to the brim with berries, so the amount will vary depending on its size. Spread the topping over the top.
- Microwave on HIGH 1 ½ minutes. This time will be dependant on your microwave wattage, the size of your mug and quantity of berries used. Continue to microwave in additional 30-second increments until the blueberries are bubbling.
- Let cool slightly before adding a scoop of vanilla ice cream, if liked. It's so yummy!
Notes
- Mugs: Use a microwave-safe mug with enough room for the blueberries to bubble as they cook. I prefer a shorter, broader mug because it gives the topping more surface area.
- Blueberries: Fresh or frozen blueberries both work well. Frozen berries do not need to be thawed, but they may require a little additional cooking time.
- Cooking Tip: Fill the mug generously with blueberries, as they will soften and shrink in the microwave.
- Instant Oats: Maple brown sugar or cinnamon spice instant oatmeal pairs especially well with blueberries.
- Cooking Time: Microwave cooking times vary. Begin with the time listed and add a few seconds as needed, until the berries are hot and bubbling.
- Texture: The topping will be softer than a traditional oven-baked crisp, with some of the oats settling into the warm blueberry sauce.
Let the crisp rest briefly before serving, as the berries will be very hot.
Nutritional information is only an estimate. The accuracy of the nutritional information for any recipe on this site is not guaranteed.
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If you try this recipe, I'd love to hear your comments and consider giving it a 5-star rating. Explore the recipe index for more easy, delicious ideas, and stay updated by subscribing to our newsletter and following us on Facebook, Pinterest, Instagram, and YouTube!
Absolutely amazing! I used instant cinnamon spice as my oatmeal of choice, Land o’ Lakes butter with olive oil spread (instead of regular butter), and then a nice scoop of chocolate ice cream on top. So incredible. ❤️
Hi Christine-- Thank you for trying the quick crisp! That scoop of chocolate ice cream idea is making me drool.
I’m impressed with how quick, easy & yummy this turned out!
Thank you for trying the recipe, Coppelia! It is such an easy treat!
I try a lot of these mug cake recipes and this is my favorite so far! Thank you for sharing!
Yay! Thank you for sharing that. It's such an easy recipe, and perfect during the fresh blueberry season! Thank you for sharing!!
This is a GREAT recipe and it comes at a good time health wise. Diagnosed with type 2 diabetes and mild fatty liver disease. Blueberries - good for both, Oatmeal - good for both, I used grass fed butter or olive oil for mixing the Brown Sugar & Maple Syrup oatmeal (low sugar variety) so I got good fat. Used Almond flour instead of cornstarch. I think adding either one makes it more filling but consider the almond flour to be a little more on the health side. I am considering adding some chopped pecans. Once you have made it a couple times you can get it done during a commercial break. I pick blueberries every season and I am going to have to increase the harvest.
Thank you, Roger, for your kind words. I'm SO glad you enjoyed the recipe and are taking care of yourself! Blueberries are awesome and I LOVE your substitutions!
How much almond flour did you use and did it thicken it?
My boyfriend and I adored this, thanks for sharing. We bought so much oatmeal during Covid 19 since it keeps and can be a good way to ration as it fills you up. Now we can turn those rations into something more fun and healthy. <3
Great, simple recipe! Delicious and done so quick! Wish I would have found this years ago. Will make a really healthy breakfast on the go too.
I’m so glad you liked it, Kelsey! It’s such a great breakfast — or treat!!
Yummy and perfect with a scoop of vanilla ice cream. I used Maple and brown sugar oatmeal and it was the perfect match.
So glad you like it, Jerri! Ice cream is a must! ??
Yum!! Quick and easy treat!! I used the whole oatmeal/butter mixture 🙂
Thank you, Tory! I love this one too. It's just SO easy!! Thanks for coming back and giving it a great rating!!
This took me way more than 2 minutes to make this. Just melting the butter and making the crumble took more than a minute. Then measuring out and washing the blueberries added more time before the microwave for 1 1/2 minutes.
It came out VERY hot and was bitter. We added a packet of stevia. There was no "crisp" so we topped it with a couple a Tbsp. of Alpen muesli. That made it crunchy and really quite good.
A little disappointing. The oats tasted raw.
So sorry, Bernadette. I love this recipe. However, cooking times vary with microwaves. If you try it again. mix the instant oats into the blueberries before cooking.
Exactly what I was craving! Instead of a packet of oatmeal though I used regular rolled oats and a little bit of brown sugar.
That sounds great! I will have to try that as well!