How to Make Microwave Cornstarch Chunks

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Cornstarch chunks are a tasty and versatile snack that can be made easily at home with just a few ingredients. By microwave cooking cornstarch mixed with seasonings into bite-sized chunks, you can create a crispy, flavorful treat in minutes.

Read on for a step-by-step guide on making microwave cornstarch chunks, along with tips for customizing them and maximizing their shelf life.

Here’s a quick answer: Mix cornstarch, butter, milk, and seasonings. Form into 1-inch chunks and place in a microwave-safe bowl. Cover with plastic wrap. Microwave for 2 minutes, then check; microwave 30 seconds more if needed until chunks are firm. Let cool completely then store in an airtight container. Microwave cooking allows customizing chunks with herbs, spices, cheese, fruit – whatever flavors you like!

Benefits of Microwave Cornstarch Chunks

There are many reasons to make your own homemade cornstarch chunks rather than buying pre-packaged snacks:

  • Cost effective – Making them yourself saves money compared to store-bought snacks. Cornstarch is an inexpensive pantry staple.
  • Customizable – You control the flavors and can adapt them to your tastes.
  • Fun activity – It’s an easy, kid-friendly cooking project. Great for parties or gifts.
  • Healthier – Avoid unwanted additives like preservatives, colors, and artificial flavors.
  • Long shelf life – Properly stored, homemade chunks stay fresh for weeks.

Microwave Cooking Method

Microwaving is a quick and easy way to convert cornstarch into crunchy little chunks:


  • 1 cup cornstarch
  • 2 tablespoons butter or oil
  • 1/4 cup milk or water
  • 1/2 teaspoon salt
  • Spices, herbs, or other flavorings as desired


  • Microwave-safe bowl
  • Microwave-safe plastic wrap or wax paper
  • Microwave oven


  1. Combine ingredients – In a microwave-safe bowl, mix together the cornstarch, butter/oil, milk/water, salt, and any flavorings until combined. The mixture should form into a thick, moldable dough.
  2. Shape the dough – Form chunks of dough into bite-sized pieces. Space them apart on the bowl.
  3. Microwave – Cover the bowl loosely with plastic wrap or wax paper. Microwave for 2 minutes. Let sit 1 minute. If chunks are still soft, microwave in 30 second intervals until hardened.
  4. Cool and store – Transfer chunks to an airtight container. Let cool completely before sealing. Store at room temperature for up to 1 month.

Flavor Ideas

Customize your cornstarch chunks with mix-ins like:

  • Spices: cinnamon, nutmeg, ginger, garlic powder, chili powder
  • Herbs: basil, oregano, rosemary, thyme
  • Nuts: pecans, walnuts, almonds
  • Dried fruits: raisins, cranberries, apricots
  • Parmesan cheese

Experiment to create your favorite savory or sweet chunk varieties!

Tips for Microwaved Cornstarch Chunks

  • Use standard fine corn starch. Do not substitute corn flour, which has different properties.
  • Combining the cornstarch with a small amount of fat like butter or oil gives chunks a richer flavor and crisper texture.
  • For lighter chunks, replace the milk/water with an equivalent amount of club soda or sparkling water.
  • Microwave in short intervals to avoid overcooking. Chunks will harden more as they cool.
  • Let chunks cool fully before storing to prevent condensation buildup in the container.
  • For even cooking, shape all chunks to a similar 1-inch size before microwaving.
  • Add a teaspoon of baking powder to the mix for extra airy, crunchy chunks.
  • For fun shapes, press dough into silicone molds before microwaving.

Storing and Serving Cornstarch Chunks

Proper storage is important for maintaining the freshness and texture of your homemade cornstarch chunks. After cooking and cooling completely, transfer the chunks to an airtight container or resealable plastic bag. Press out any excess air before sealing to prevent moisture buildup. Store the sealed container in a cool, dry place like the pantry.

The chunks will stay fresh for up to 1 month at room temperature. For extended shelf life, refrigerate the sealed chunks for up to 3 months. You can also freeze cooled chunks in an airtight container or freezer bag for up to 6 months.

When ready to serve cornstarch chunks, it’s best to let chilled or frozen chunks come to room temperature first. This prevents condensation from forming on the chunks and keeps the texture crispy. If serving chunks straight from the fridge or freezer, allow them to sit out for 15-20 minutes before eating. You can enjoy cornstarch chunks on their own as a healthy finger food snack. They also make a fun, crunchy topping for soups, salads, yogurts, oatmeal, and desserts.

Get creative with how you use them! Drizzle cooked chunks with honey or chocolate sauce for a sweet treat. Or add them to trail mixes and granola for extra crunch. Their mild flavor and versatile texture lend well to both savory and sweet applications.

Storing cornstarch chunks properly ensures they stay fresh and crisp for weeks. Letting chilled chunks come to room temp before serving prevents sogginess. Beyond snacking, they can add tasty texture to all kinds of dishes.

Frequently Asked Questions

What is the ideal size to make cornstarch chunks?

The best size is around 1-inch chunks. This allows even cooking throughout. Shape the dough into pieces about the size of large marbles before microwaving.

Can I use a microwave-safe plastic container instead of a bowl?

Yes, any microwave-safe vessel will work. The plastic wrap or wax paper is mainly to prevent splattering. The container sides will also help contain splatters.

How do I adapt the recipe for a bigger batch?

Easily double or triple the recipe. Use a larger microwave-safe container. You’ll likely need to microwave the chunks in batches. Increase cooking times by 30 seconds to 1 minute per batch.

Why do my chunks turn out hard and tough?

Overcooked chunks can turn hard. Use shorter microwave times and check often. Chunks will continue to set after removing them from the microwave. It’s better to slightly undercook them initially.

How can I add more flavor to the chunks?

Mix in any dried herbs, spices, cheeses, nuts, or dried fruits to customize the taste. Try Italian, Mexican, or Asian spice blends for themed flavors.


Homemade microwave cornstarch chunks are a quick, easy, and customizable snack you can feel good about eating. By following the simple steps above, you can whip up a batch of flavorful, crunchy chunks in minutes with basic pantry ingredients. Adjust the seasonings to suit your tastes and keep bags of chunks on hand for healthy snacking anytime.

Made without artificial additives, cornstarch chunks are a cost-effective and family-friendly cooking project. Let your imagination run wild coming up with fun new chunk flavors and recipes to try. Enjoy this satisfying snack on its own or as a topping for all your favorite foods.

By Rosie Elliott

I’m Rosie. I’m a professional chef with experience in Western, Mediterranean, and Italian cuisine. I’ve been cooking for over 15 years, and I have two daughters that keep me busy!

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