Kid-friendly Bubbly Fruit-Filled Crumbly Crisp in a Mug Recipe - Sticky Fingers Cooking
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Recipe: Bubbly Fruit-Filled Crumbly Crisp in a Mug

Recipe: Bubbly Fruit-Filled Crumbly Crisp in a Mug

Bubbly Fruit-Filled Crumbly Crisp in a Mug

by Erin Fletter
Photo by Natasha McCone and Kate Bezak
prep time
10 minutes
cook time
2 minutes
1-2 servings

Fun Food Story

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Bubbly Fruit-Filled Crumbly Crisp in a Mug

We love making fruit crisps, and here’s why: You can take just about any fruit in season, frozen or fresh, and top it with a simple mix of oats, sugar, and butter, that you barely need to measure, then bake (or in this case, microwave), and you’ve got a delicious, cozy dessert. Kid chefs will go crazy for this incredibly easy and tasty idea.

Happy & Healthy Cooking,

Chef Erin, Food-Geek-in-Chief

Fun-Da-Mentals Kitchen Skills

  • chop :

    to cut something into small, rough pieces using a blade.

  • layer :

    to arrange foods in layers, such as sliced fruit in a pie or tart, or sliced potatoes in a potato gratin; or to build flavors by adding seasonings or foods that may be dissimilar but complement the overall dish.

  • microwave :

    to heat or cook food or liquid quickly in a microwave oven, which uses high-frequency electromagnetic waves to generate heat in the food's water molecules.

  • squeeze :

    to firmly press or twist a food with fingers, hands, or a device to remove its liquid, like shredded potatoes, frozen and thawed spinach, or tofu.

  • stir :

    to mix together two or more ingredients with a spoon or spatula, usually in a circle pattern, or figure eight, or in whatever direction you like!

Equipment Checklist

  • Microwave
  • Microwave-safe mug
  • Measuring spoons
  • Dry measuring cup
  • Whisk
  • Spatula
  • Cutting board + kid-safe knife
  • Clean, damp dish towel
  • Soap for cleaning hands
  • Cereal or mixing bowls (2)
  • Paper towels (2)
  • Spoon
  • Citrus juicer (optional)


Bubbly Fruit-Filled Crumbly Crisp in a Mug

  • 1/2 C fresh or frozen berries (use blueberries, raspberries, strawberries, blackberries, or mixed berries)
  • 1/2 tsp cornstarch (or arrowroot powder)
  • 2 tsp sugar
  • 1/2 lemon
  • 1/3 C quick-cooking oats **(for GLUTEN ALLERGY use certified gluten-free quick oats or gluten-free cornflakes cereal)**
  • 2 tsp brown sugar or maple syrup
  • 2 T olive oil

Food Allergen Substitutions

Bubbly Fruit-Filled Crumbly Crisp in a Mug

  • Gluten/Wheat: Use certified gluten-free quick oats or gluten-free cornflakes cereal. Use certified gluten-free pure vanilla extract, not imitation vanilla flavor.


Bubbly Fruit-Filled Crumbly Crisp in a Mug

chop + slice + add

Chop 1/2 cup fresh or frozen berries into a small dice. Slice small berries in halves. Add berries to a mixing bowl. (If your berries are frozen, add them to a microwave-safe mug or bowl and microwave, using the defrost setting, for 25 seconds.)

measure + add

Measure 1/2 teaspoon cornstarch and 2 teaspoons sugar and add those to the berries.

slice + squeeze + mix

Slice 1 lemon in half and squeeze the juice from 1/2 lemon into the bowl with the berries. Watch for seeds! (Tip: To make your lemons easier to squeeze, microwave them for 15 to 20 seconds, and let them cool enough to handle!) Kid chefs can squeeze 1/2 lemon into their empty cereal bowl, fish out the seeds, and add the juice to the bowl with the berries. Mix!

measure + mix

Add **1/3 cup quick-cooking oats, 2 teaspoons brown sugar, and 2 tablespoons olive oil** to another bowl. Mix!

layer + repeat

Add a spoonful of berry mixture to the bottom of a microwave-safe mug. Follow with a spoonful of oat crisp mixture. Repeat until you’ve used all of your berries, ending with a topping of oat crisp.

smoosh + cover + microwave

Smoosh the berry crisp down into the mug with a spoon, then cover the mug with a damp paper towel. Microwave on high for 2 minutes. Let stand for at least 1 minute to cool down.

stir + microwave + top

Stir the berry crisp mixture, then cover with the damp paper towel again. Microwave for an additional 30 seconds. Top with a dollop of Wondrous Whipped Yogurt (see recipe), and enjoy!

Surprise Ingredient: Berries!

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Photo by Ana Hollan/ (girl eating wild elderberries)

Hi! I'm a Berry!

"To be specific, I'm an edible berry. We might be sweet or sour, colorful, juicy, and delicious! People around the world eat us alone, with other foods, and in jams, preserves, and pies! Yum! Did you know that bananas, pumpkins, tomatoes, and watermelons are technically berries!" 

  • Thousands of years ago, before crops were domesticated, hunter-gatherers picked wild berries, an activity people still enjoy doing today. 
  • Berry cultivation may have begun as early as the 10th century in Japan, the 14th century in Europe, and the 18th century in the United States. 
  • The word "berry" comes from the Old English "berie," from the German "beere."
  • Globally, strawberries are grown twice the amount of any other berry, although strawberries, blackberries, and raspberries are not actual berries, botanically speaking—they are aggregate fruits. 
  • Botanical berries include blueberries, cranberries, elderberries, gooseberries, lingonberries, and persimmons.
  • Berries are a wonderful snack eaten by themselves or added to cold and hot cereal. But they are equally delightful when made into preserves, jams, and sauces. In addition, berries are often used in baked goods like cakes, cobblers, muffins, and pies. 
  • Berries are often called a "superfood" and are recommended by doctors and nutritionists for a healthy diet. They are high in antioxidants and fiber, and many have essential nutrients like vitamin C, helping to protect against cancer and chronic disease.

History of Crisps and Crumbles!

Photo by Elena Veselova/
  • A crisp is a dessert of baked fruit blanketed under a crumbly, crispy topping of oats, butter, and sugar. 
  • Crisps are almost the same as crumbles, the name for the dessert in Great Britain, and where the first crumble is said to have been made.
  • During wartime, common ingredients were often rationed. During the Second World War, it wasn’t easy to get the items necessary to make a pie, and that is when the crumble and crisp were invented
  • You can make a crisp with pretty much any fruit, as long as it bubbles when cooked: apples, peaches, rhubarb, cherries, plums, berries, and more! You can even make a tomato crisp!

Let's Learn About the United States!

Photo by JeniFoto/ (July 4th Picnic)
  • Most of the United States of America (USA) is in North America. It shares its northern border with Canada and its southern border with Mexico. It consists of 50 states, 1 federal district, 5 territories, 9 Minor Outlying Islands, and 326 Indian reservations. 
  • The country's total area is 3,796,742 square miles, globally the third largest after Russia and Canada. The US population is over 333 million, making it the third most populous country in the world, after China and India.
  • The United States of America declared itself an independent nation from Great Britain on July 4, 1776, by issuing the Declaration of Independence.
  • The Revolutionary War between the US and Great Britain was fought from 1775-1783. We only had 13 colonies at that time! On September 9, 1976, the Second Continental Congress met in Philadelphia and declared that the new nation would be called the United States. 
  • The 13 colonies became states after each ratified the constitution of the new United States, with Delaware being the first on December 7, 1787.  
  • The 13 stripes on the US flag represent those first 13 colonies, and the 50 stars represent our 50 states. The red color of the flag symbolizes hardiness and valor, white symbolizes innocence and purity, and blue symbolizes vigilance and justice.
  • Before settling in Washington DC, a federal district, the nation's capital resided in New York City and then Philadelphia for a short time. New York City is the largest city in the US and is considered its financial center. 
  • The US does not have a recognized official language! However, English is effectively the national language. 
  • The American dollar is the national currency. The nickname for a dollar, "buck," comes from colonial times when people traded goods for buckskins!
  • Because the United States is so large, there is a wide variety of climates and types of geography. The Mississippi/Missouri River, running primarily north to south, is the fourth-longest river system in the world. On the east side of the Mississippi are the Appalachian Mountains, the Adirondack Mountains, and the East Coast, next to the Atlantic Ocean. 
  • On the west side of the Mississippi are the flat Great Plains, the Rocky Mountains (or Rockies), and the West Coast, next to the Pacific Ocean, with several more mountain ranges in coastal states, such as the Sierras and the Cascades. Between the coasts and the north and south borders are several forests, lakes (including the Great Lakes), rivers, swamps, deserts, and volcanos. 
  • Several animals are unique to the US, such as the American bison (or American buffalo), the bald eagle, the California condor, the American black bear, the groundhog, the American alligator, and the pronghorn (or American antelope). 
  • The US has 63 national parks. The Great Smoky Mountains, Yellowstone, Yosemite, Zion, and the Grand Canyon, with the Colorado River flowing through it, are among the most well-known and visited.
  • Cuisine in the US was influenced early on by the indigenous people of North America who lived there before Europeans arrived. They introduced beans, corn, potatoes, squash, berries, fish, turkey, venison, dried meats, and more to the new settlers. Other influences include the widely varied foods and dishes of enslaved people from Africa and immigrants from Asia, Europe, Central and South America, and the Pacific Islands. 

What's It Like to Be a Kid in the United States?

  • Education is compulsory in the US, and kids may go to a public or private school or be home-schooled. Most schools do not require students to wear uniforms, but some private schools do. The school year runs from mid-August or the beginning of September to the end of May or the middle of June.
  • Kids generally start school at about five years old in kindergarten or earlier in preschool and continue through 12th grade in high school. After that, many go on to university, community college, or technical school. 
  • Spanish, French, and German are the most popular foreign languages kids learn in US schools. 
  • Kids may participate in many different school and after-school sports, including baseball, soccer, American football, basketball, volleyball, tennis, swimming, and track and field. In grade school, kids may join in playground games like hopscotch, four-square, kickball, tetherball, jump rope, or tag.
  • There are several fun activities that American kids enjoy doing with their friends and families, such as picnicking, hiking, going to the beach or swimming, or going to children's and natural history museums, zoos and wild animal parks, amusement parks, water parks, state parks, or national parks. Popular amusement parks include Disneyland, Disney World, Legoland, Six Flags, and Universal Studios.
  • On Independence Day or the 4th of July, kids enjoy a day off from school, picnicking, and watching fireworks with their families. 
  • Thanksgiving is celebrated on the last Thursday in November when students get 2 to 5 days off school. Christmas, Hanukkah, and Kwanzaa are popular December holidays, and there are 2 or 3 weeks of winter vacation. Easter is celebrated in March, April, or May, and kids enjoy a week of spring recess around that time.  
  • Barbecued hot dogs or hamburgers, watermelon, apple pie, and ice cream are popular kid foods for 4th of July celebrations. Turkey, dressing, green bean casserole, cranberry sauce, and pumpkin pie are traditional Thanksgiving foods. Birthday parties with cake and ice cream are very important celebrations for kids in the United States!

That's Berry Funny

Why did the blueberry stop in the middle of the road? 

Because he ran out of juice!

THYME for a Laugh

What’s a ghost’s favorite fruit? 


Lettuce Joke Around

Why were the little strawberries upset? 

Because their parents were in a jam!

Lettuce Joke Around

What did one raspberry say to the other raspberry? 

"If you weren't so sweet, we wouldn't be in this jam!"

THYME for a Laugh

What is a scarecrow’s favorite fruit? 


Lettuce Joke Around

What do you call a sad raspberry? 

A blueberry.

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