Quick Caramelized Onions

Quick Caramelized Onions

Prep Time

3 mins

Cook Time

20-21 mins

Free Time

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Believe the magic — make caramelized onions in the microwave! This recipe relies on a secret ingredient: baking soda. Cooking the onions with baking soda kickstarts the caramelization process, no constant stirring or babysitting required.

All of Anyday’s recipes are tested (and retested!) in many different microwaves and home kitchens to make sure they work — and work well.

What You’ll Need

What You’ll Need

medium deep dish from anyday

The Medium Deep Dish

The best dish for 1-2 portions of grains, veggies, mac and cheese, ramen, and more.
The Anyhand Mitts

The Anyhand Mitts

Handle hot Anyday dishes with care with these microwave mitts that double as trivets!

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Select your serving size and microwave wattage in the dropdown. The recipe will change accordingly.


Select your microwave wattage in the dropdown. The cook times in this recipe will automatically change accordingly.


To find your microwave’s wattage, look at the front panel, the side of the door, in the back, in the user manual, or Google the model number. If both an input and output wattage are listed, use the output.

Wattage translates to how powerful the microwave is. The higher the wattage, the faster your food will cook. The lower the wattage, the longer the cook time.

When in doubt, start with less time — you can always add more.



  • 3 cups (300g) thinly sliced white onion
  • ½ teaspoon baking soda
  • 3 tablespoons butter
  • Sprig of fresh thyme (optional)


  1. Toss onions, baking soda, butter, and thyme (if using) in the Anyday Deep dish.
  2. Cook uncovered for minutes or until the onions have turned a medium golden brown. Check halfway through cook time to make sure the onions are cooking properly. 
  3. Note that some liquid will bubble up. This is normal, and it is due to the release of juices during the cooking process. As the onion cooks down, the bubbling will stop.
  4. Enjoy caramelized onions warm, or store in an airtight container and refrigerate for up to 5 days.

Serving suggestions & tips

  • This recipe can be made vegan by substituting olive oil for butter.
  • Top a burger or hot dog for a quick, pub-inspired dinner.
  • Finely chop caramelized onions and add them to mac and cheese for an extra flavorful dish.

Recipe notes

  • Note: It is important to use a Deep Dish for this recipe! A Shallow Dish will spread out the onions and liquid, forcing it to evaporate too quickly in the microwave. Too little liquid can result in scorched onions!
  • Microwave ovens vary, even with the same wattages. Adjust cooking times as needed.

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