Blueberry Crumble Mug Pie

By
Kristina Vanni
Kristina Vanni
Kristina Vanni
An internationally recognized culinary authority, Kristina Vanni is well-known for her recipe development, food photography, and experience as a TV show host.
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Updated on 07/2/21
Blueberry Crumble in a Mug

The Spruce / Kristina Vanni & Eric Kleinberg

Prep: 4 mins
Cook: 4 mins
Cool Time: 1 mins
Total: 9 mins
Serving: 1 serving
Yield: 1 mug
Nutrition Facts (per serving)
266 Calories
6g Fat
54g Carbs
3g Protein
Show Full Nutrition Label Hide Full Nutrition Label
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Nutrition Facts
Servings: 1
Amount per serving
Calories 266
% Daily Value*
Total Fat 6g 7%
Saturated Fat 3g 13%
Cholesterol 10mg 3%
Sodium 39mg 2%
Total Carbohydrate 54g 20%
Dietary Fiber 6g 22%
Total Sugars 35g
Protein 3g
Vitamin C 4mg 19%
Calcium 46mg 4%
Iron 1mg 6%
Potassium 172mg 4%
*The % Daily Value (DV) tells you how much a nutrient in a food serving contributes to a daily diet. 2,000 calories a day is used for general nutrition advice.
(Nutrition information is calculated using an ingredient database and should be considered an estimate.)

Sometimes a sweet craving hits, but you don't have the time or the energy to bake up an entire dessert. Plus, there can be too many leftovers after baking a treat fit for a crowd. The answer is a quick and easy dessert in a mug.

This blueberry crumble in a mug uses ingredients you likely already have on hand, as well as either fresh, seasonal berries or frozen fruit. The blueberries are warmed in a mug along with some brown sugar and a little cornstarch. This sweetens the berries and creates that delicious sauce we love in a warm berry crumble. The crumble oat topping becomes perfectly warm and bubbly in the microwave in a matter of minutes.

Microwave mug desserts are a great option for kids who are interested in baking since there's no oven or stove involved. Plus, there are minimal dirty dishes, making for super easy clean-up. This single-serving dessert is great on its own or it can be topped with a dollop of whipped cream or even a small scoop of ice cream.

Ingredients

  • 1 cup frozen blueberries

  • 2 tablespoons brown sugar, divided

  • 1 teaspoon cornstarch

  • 3 tablespoons rolled oats

  • 1/4 teaspoon cinnamon

  • 1 teaspoon butter

  • 2 tablespoons whipped cream to serve

Steps to Make It

  1. Gather the ingredients.

    Blueberry Crumble in a Mug ingredients

    The Spruce / Kristina Vanni & Eric Kleinberg

  2. Place the frozen blueberries in a 12-ounce mug. (The blueberries should come up almost all the way to the top of the mug.)

    Blueberries in a mug

    The Spruce / Kristina Vanni & Eric Kleinberg

  3. Sprinkle with 1 tablespoon of brown sugar and the cornstarch. Microwave on high for 30 seconds.

    Blueberries in a mug topped with brown sugar and cornstarch

    The Spruce / Kristina Vanni & Eric Kleinberg

  4. Stir gently so you don’t break up the berries, then microwave again in 30 second intervals until the sauce starts to thicken. Depending on the strength of your microwave, this could take up to 1 minute and 30 seconds.

    Blueberry filling in a mug

    The Spruce / Kristina Vanni & Eric Kleinberg

  5. In a small bowl combine the rolled oats, remaining 1 tablespoon of brown sugar, and the cinnamon. Mash in the butter with a fork or your fingers to create the crumble topping.

    Crumble topping ingredients in a small bowl

    The Spruce / Kristina Vanni & Eric Kleinberg

  6. Sprinkle over the warmed blueberries and microwave for 1 minute and 30 seconds.

    Blueberry Crumble in a Mug ready to be microwaved

    The Spruce / Kristina Vanni & Eric Kleinberg

  7. Allow to stand for 1 minute before serving.

    Cooked Blueberry Crumble in a Mug

    The Spruce / Kristina Vanni & Eric Kleinberg

  8. Top with a dollop of whipped cream and serve.

    Blueberry Crumble in a Mug topped with whipped cream

    The Spruce / Kristina Vanni & Eric Kleinberg

Tips

  • If you use fresh blueberries it may take less time for the filling to thicken up. Microwave in increments so you can check often.
  • Since microwave strengths and mug sizes vary, you might be concerned that the warm berry filling will bubble up and spill over while heating. For easy cleanup, simply place the mug on a microwave-safe plate.
  • Use care when taking the mug out of the microwave between steps and when ready to top and serve. Microwave strengths vary and the mug can become very hot. Use oven mitts or a thick kitchen towel to protect your hands.