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Home » Recipes » Courses » Desserts

Microwave Rhubarb Crisp (in a mug)

Published: Jul 3, 2022 by Terri Gilson · Modified: Jul 3, 2022 · As an Amazon Associate I earn from qualifying purchases. This post may contain affiliate links · 7 Comments

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pin with photo of rhubarb crisp in a glass mug and white text on red/pink background at top and bottom

Do you only have a small amount of rhubarb? Or do you only want to make a small rhubarb crisp? Or maybe you don't want to heat up your house making rhubarb crisp? OR you simply just need an easy rhubarb crisp STAT!? If you said "YES!" to any of these statements, then this is your microwave rhubarb crisp recipe!

rhubarb crisp in a mug, topped with whipped cream with a stick of cinnamon, a spoon on the side and chopped rhubarb and cinnamon sticks strewn around

This individual rhubarb crisp is made with a small amount of rhubarb and cooked in a mug in the microwave! This recipe is popular during rhubarb season (April until July) and was inspired by my Healthy Apple Crisp in a Mug on this site! If you're looking for recipes for rhubarb crisp or for using up a small amount of rhubarb, you'll love this version! It's a quick and delicious way to get your rhubarb crisp fix.

Jump to:
  • 🥘Ingredients
  • 🔪Instructions
  • 📖Variations & Substitutions
  • 🍽Equipment
  • 🌡️Storage
  • 👪 Serving Size
  • 💭Top tips
  • ⭐ Reviews
  • 📋 Microwave Rhubarb Crisp (in a mug)
  • 📋More Rhubarb Recipes

If you don't grow your own rhubarb, you can often find it at the grocery store or at a Farmer's Market during rhubarb season.

rhubarb plant

🥘Ingredients

This easy rhubarb crisp recipe has quite a bit of sugar to balance out the tart rhubarb, but you can reduce it to your liking or use a sugar substitute, if you prefer.

For this microwave crisp recipe, you'll need:

ingredients for microwave rhubarb crisp in a mug on a faux wooden surface, in glass bowls, labelled
  • fresh rhubarb (or frozen rhubarb)
  • all-purpose flour
  • brown sugar
  • white granulated sugar
  • vanilla extract
  • unsalted butter
  • quick rolled oats
  • cinnamon
  • orange zest
  • whipped cream (optional)

*See recipe card for quantities

🔪Instructions

Cooking rhubarb in the microwave:

Cooking rhubarb in the microwave is quick and easy!

rhubarb, brown sugar, white sugar, flour, vanilla extract and orange zest in a glass bowl

Filling: Toss chopped rhubarb with brown sugar, white sugar, orange zest, vanilla extract, cinnamon and flour.

rhubarb mixture in microwave safe mug

Take a microwave safe mug and fill it with the rhubarb mixture.

Topping ingredients in a glass bowl

Topping: In a small bowl combine flour, quick oats, brown sugar, white sugar and cinnamon. Cut the butter in to create the crisp topping (or see top tip in post for grating frozen butter)

topping poured over rhubarb filling in a glass mug

Spoon the crisp topping over the rhubarb mixture. Place in the microwave oven and cook on high for about- 2 ½ minutes or until the butter is melted into the topping. *Cooking time is based on my 1200W microwave so your timing might vary between 2-3 minutes.

Hint: Carefully remove from the microwave (I use an oven mitt) and let stand until cool enough to eat. Be careful because it's going to be really hot at first! When it has cooled a little mix it together for best taste results, then add the whipped cream, cinnamon and orange zest garnish (optional)

📖Variations & Substitutions

  • WW friendly - use a light butter or margarine and a sugar substitute (like Monk fruit)
  • Dairy-free - use a vegan margarine ( I use Becel)
  • Rhubarb- you can use fresh rhubarb or frozen rhubarb for this recipe (see top tip for using frozen)
rhubarb crisp in a mug, topped with whipped cream with a stick of cinnamon, a spoon being held up with rhubarb crisp on it, and chopped rhubarb and cinnamon sticks strewn around

🍽Equipment

For this individual rhubarb crisp, you'll need a microwave safe mug, a zester, pastry cutter (or use a cheese grater -see my Top Tip below) (affiliate links)

🌡️Storage

Store this recipe for rhubarb crisp for one in and airtight container in the fridge for up to 3 days. Alternatively, once the mug has completely cooled, cover it in plastic wrap and store it right in the mug, in the fridge. You can also freeze it in an sealed container for up to 3 months.

👪 Serving Size

This is a single serving rhubarb crisp so it makes 1 serving. However, you can half, double or triple the recipe by clicking on the blue serving number and selecting the number of servings you'd like. The ingredient quantities will automatically adjust. You'll just need a larger mug (I doubled the recipe for the very large mug in the photos) or additional mugs and additional cooking time. You can serve this easy rhubarb crisp in a mug or in a dessert dish!

rhubarb crisp in a glass dessert dish with whipped cream on top and a cinnamon stick and spoon and chopped rhubarb in the background

💭Top tips

Frozen Rhubarb: if you are making rhubarb crisp with frozen rhubarb it's really important to completely defrost and drain the rhubarb first, then measure. It shrinks in the freezing process. *don't measure it frozen

Keep your butter in the freezer and grate it into the crisp - it's so much easier and less mess!

butter being cut (for pastry) with a cheese grater

There is no sacrificing taste with with making Rhubarb Crisp in the microwave. The only difference is that you save time and don't heat up your house. Plus, you have a delicious single serving of rhubarb crisp in only a few minutes. So if you are looking for quick and easy recipes for rhubarb crisp to savor the taste of summer, you'll love this one!

And if you love crisps and crumbles, give my Mixed Berry Crumble (with Lemon, Mint & Coconut) a try!

⭐ Reviews

Did you LOVE this easy rhubarb crisp recipe? If so, please leave a 5 star rating and comment below!

rhubarb crisp in a mug, topped with whipped cream with a stick of cinnamon, a spoon on the side and chopped rhubarb and cinnamon sticks strewn around
Food Meandering Logo

📋 Microwave Rhubarb Crisp (in a mug)

This Microwave Rhubarb Crisp is an individual rhubarb crisp, made with a small amount of rhubarb and cooked in a mug in the microwave!
5 from 5 votes
Print Pin Rate
Course: Dessert, Snack
Cuisine: American, Canadian, North American
Keyword: apple crisp, microwave, rhubarb
Special Diet: Vegetarian
Servings: 1 serving
Calories: 466kcal
Author: Terri Gilson
Prep Time: 5 minutes minutes
Cook Time: 3 minutes minutes
Total Time: 8 minutes minutes
Prevent your screen from going dark

Ingredients

Filling

  • ¾ cup rhubarb (fresh or frozen) * if using frozen, see Top Tips
  • ½ teaspoon vanilla
  • 2 tablespoon white granulated sugar
  • 1 tablespoon brown sugar
  • ¼ teaspoon orange zest
  • ½ teaspoon cinnamon
  • 1 tablespoon all-purpose flour

Topping

    • 3 tablespoon quick rolled oats
    • 1 tablespoon all purpose flour
    • 1 tablespoon brown sugar
    • ½ tablespoon white granulated sugar
    • ½ teaspoon cinnamon
    • 1 tablespoon unsalted butter (cold or frozen - see top tips)

    Garnish

    • 2 light whipped cream * I use light real whipped cream (spray bottle)
    • cinnamon
    US Customary - Metric

    Instructions

    Filling:

    • Toss chopped rhubarb with brown sugar, white sugar, orange zest, vanilla extract, cinnamon and flour.
      rhubarb, brown sugar, white sugar, flour, vanilla extract and orange zest in a glass bowl
    • Take a microwave safe mug and fill it with the rhubarb mixture.
      rhubarb mixture in microwave safe mug

    Topping:

    • In a small bowl stir in the rolled oats, flour, brown sugar, white sugar and cinnamon. Cut the cold butter in with a pastry blender to create the crisp topping (or see top tip in post for grating frozen butter)
      Topping ingredients in a glass bowl
    • Spoon the crisp mixture over the top of the fruit filling. Microwave for about- 2 ½ minutes or until the butter is melted into the topping. Cooking time is based on my 1200W microwave so your timing might vary between 2-3 minutes.
      topping poured over rhubarb filling in a glass mug
    • Carefully remove from the microwave (I use an oven mitt) and let stand until cool enough to eat. Be careful because it's going to be really hot at first!
      rhubarb crisp in a mug, topped with whipped cream with a stick of cinnamon, a spoon on the side and chopped rhubarb and cinnamon sticks strewn around

    Garnish

    • Enjoy warm or cold with whipped cream or a big scoop of vanilla ice cream and a sprinkle of cinnamon and additional orange zest.

    Notes

    *Please see post contents for important recipe information and tips!
    Please SUBSCRIBE  (get my FREE E-cookbook) and be sure to FOLLOW ME on FACEBOOK, TWITTER, INSTAGRAM and PINTEREST!
     
    Nutrition Facts
    📋 Microwave Rhubarb Crisp (in a mug)
    Amount Per Serving (1 mug)
    Calories 466 Calories from Fat 126
    % Daily Value*
    Fat 14g22%
    Saturated Fat 8g50%
    Trans Fat 0.5g
    Polyunsaturated Fat 1g
    Monounsaturated Fat 3g
    Cholesterol 33mg11%
    Sodium 103mg4%
    Potassium 393mg11%
    Carbohydrates 83g28%
    Fiber 5g21%
    Sugar 55g61%
    Protein 5g10%
    Vitamin A 480IU10%
    Vitamin C 8mg10%
    Calcium 135mg14%
    Iron 2mg11%
    * Percent Daily Values are based on a 2000 calorie diet.

    Nutrition

    Serving: 1mug | Calories: 466kcal (23%) | Carbohydrates: 83g (28%) | Protein: 5g (10%) | Fat: 14g (22%) | Saturated Fat: 8g (50%) | Polyunsaturated Fat: 1g | Monounsaturated Fat: 3g | Trans Fat: 0.5g | Cholesterol: 33mg (11%) | Sodium: 103mg (4%) | Potassium: 393mg (11%) | Fiber: 5g (21%) | Sugar: 55g (61%) | Vitamin A: 480IU (10%) | Vitamin C: 8mg (10%) | Calcium: 135mg (14%) | Iron: 2mg (11%)
    Did you make this recipe? Please leave a star rating and review below!
    Rate this Recipe

    📋More Rhubarb Recipes

    • Rhubarb Squares
    • Rhubarb Dessert (No Bake)
    • Rhubarb Coffee Cake Recipe
    • Sticky Rhubarb Pudding
    • 2 Ingredient Rhubarb Lemonade
    • Healthy Rhubarb Muffins (Weight Watchers Friendly)
    • Stewed Rhubarb Recipe (with Strawberry Gelatin)

    « Corn Stuffed Grilled Peppers
    Slow Cooker New England Baked Beans »

    Reader Interactions

    Comments

    1. nancy

      July 05, 2022 at 4:07 pm

      lovely!! how perfect is this to be made in the microwave! the flavour combo was great and not too sweet!

      Reply
    2. Bernice

      July 05, 2022 at 8:51 pm

      Ooooh this is DANGEROUSLY good. With just the two of us in the house, I didn't want to make an entire rhubarb crisp. Now I can and we don't have to eat a giant pan of it!

      Reply
      • Terri Gilson

        July 13, 2022 at 8:12 pm

        I know, Bernice! I can't make it too often 🙂

        Reply
    3. Shelby

      July 07, 2022 at 11:25 am

      Anything in a mug is a huge win for me and the crumble topping on this was probably my favorite part hehe. Glad it's a mini serving!

      Reply
    4. Asha

      July 10, 2022 at 10:36 am

      Such a cute little mug of rhubarb deliciousness. Love how easy and quick this is to make! And the portion size is perfect for someone who lives alone.

      Reply
    5. Ed

      April 28, 2023 at 3:05 pm

      Tried this with our first 4-5 stalks of spring. It was so easy and incredibly delicious!

      Ed in Wisconsin

      Ps. Didn’t have any quick oatmeal, so used packet of flavored instant and mixed with butter for topping and it turned out great.

      Reply
      • Terri Gilson

        May 02, 2023 at 6:49 am

        Hi Ed,
        I'm so glad you enjoyed it! Glad to hear that you were able to improvise with the oatmeal too 🙂
        Terri

        Reply

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    I'm Terri, a passionate home cook and baker, an award-winning recipe developer and a busy working mom that is trying to eat healthy and fit everything into not enough hours in a day! My mission is to share not only my recipes, cooking hacks and tips with you, but also my secrets to successful weight maintenance.

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