2 Minute Blueberry Crisp in a Mug

This 2 Minute Blueberry Crisp in a Mug is my go-to when I want something warm, fruity, and comforting without spending time baking a whole dessert. I love how quickly it comes together and how perfectly it satisfies my sweet cravings.

Why You’ll Love This Recipe

I love this recipe because it’s incredibly fast to make, and I don’t need to turn on the oven. The blueberries become juicy and warm, while the oatmeal topping gives me that cozy crisp texture I crave. It’s portioned perfectly for one, so I don’t have to worry about leftovers. Whether I’m making a late-night treat or a quick snack, this mug crisp always delivers.

Ingredients

▢1/2 packet of flavored instant oatmeal
▢1 tablespoon butter melted
▢3/4 cup blueberries fresh or frozen
▢1/2 teaspoon cornstarch see note

(Note: All ingredient amounts are listed in the recipe card below.)

Directions

1. I start by placing the blueberries in a microwave-safe mug.
2. I sprinkle the cornstarch over the blueberries and stir gently to coat them.
3. I mix the instant oatmeal with the melted butter until it forms a crumbly texture.
4. I spoon the oatmeal mixture over the blueberries in the mug.
5. I microwave on high for about 90 seconds to 2 minutes, until the blueberries are bubbling and the topping is set.
6. I let it cool slightly before enjoying, as the filling will be very hot.

Servings and Timing

This recipe makes 1 serving. It takes just 2 minutes to cook in the microwave, plus about 2 minutes for prep.

Variations

I sometimes swap the blueberries for raspberries, strawberries, or even diced apples. If I want extra sweetness, I drizzle a little honey or maple syrup over the topping before microwaving. For added crunch, I like to mix in some chopped nuts with the oatmeal. If I’m craving a creamier dessert, I top it with a scoop of vanilla ice cream or a dollop of whipped cream.

Storage/Reheating

Since this is a single-serve recipe, I usually enjoy it fresh. But if I do make an extra mug, I cover it and store it in the refrigerator for up to 1 day. To reheat, I simply microwave it for 30–45 seconds until warmed through.

FAQs

Can I use plain instant oatmeal instead of flavored?

Yes, I can use plain oatmeal, but I usually add a touch of sugar or cinnamon to enhance the flavor.

Can I make this with rolled oats instead of instant?

I can, but rolled oats take longer to soften, so the texture may be chewier.

Can I use frozen blueberries?

Yes, I often use frozen blueberries, and they work perfectly. I just don’t thaw them first.

Do I need to use cornstarch?

Cornstarch helps thicken the blueberry juices, but I sometimes skip it if I don’t mind a looser filling.

Can I make this dairy-free?

Yes, I replace the butter with coconut oil or a dairy-free butter substitute.

Can I double the recipe?

I can double it, but I prefer to make two separate mugs so the topping cooks evenly.

Can I bake this in the oven instead of the microwave?

Yes, I bake it at 350°F for about 15 minutes if I want a more traditional baked crisp.

Can I add sugar to the filling?

If I want it sweeter, I sprinkle in a teaspoon of sugar or honey with the blueberries.

What flavored oatmeal works best?

I like using apple cinnamon or maple brown sugar oatmeal because it pairs well with the blueberries.

Can I prepare it ahead of time?

I can assemble the mug ahead and keep it in the fridge for a few hours, then cook it when I’m ready to eat.

Conclusion

This 2 Minute Blueberry Crisp in a Mug is one of my favorite quick desserts because it’s warm, fruity, and satisfying without requiring a lot of effort. I love how versatile it is and how I can switch up the flavors based on what I have on hand. It’s the perfect treat when I want something homemade and comforting in just minutes.

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