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Low Carb Onion Buns

Low Carb Buns packed with oniony goodness? Yes please!

These onion packed low carb buns are super quick and easy to throw together for some extra delicious keto burgers or low carb sandwiches.

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I LOVE to bake; Have since I was a little girl. Baking is therapeutic and right now, with Addie getting her 2 year molars, I need all the therapy I can get! Needless to say I’ve been baking up a storm.

Zoey and I made some delicious organic raspberry apple cinnamon muffins and a loaf of organic whole wheat bread. The beautiful scents that were wafting through my house was driving me bonkers! Who doesn’t audibly sigh at the scent of fresh bread?

To make up for it, I decided to bake some yummy low carb buns to go with the burgers I made for dinner. My mom used to make these incredible onion buns, so I made a low carb version… YUM!!

These go great with burgers or any kind of sandwich you want! I also love to dip them in soup. They are basically magic. I hope you love these low carb buns as much as I do!

Crispy Keto Chicken Burger with a Low Carb Onion Bun.

Why this recipe works

  1. Burger buns loaded with all sorts of oniony goodness? That alone is why this recipe works so, so well.
  2. These low carb buns not only have great flavour, they hold up super well so are perfect for any sort of burger or sandwich.
  3. They are ready in no time! I love how fast I can toss a batch together, especially when I lose track of time.
Low Carb Onion Buns fresh from the oven.

Low Carb Onion Bun Ingredients

These low carb buns are a variation of the fathead dough. I use a similar dough for my Everything Bagels and Fathead Pizza Crust. This is what you’ll need:

  • butter
  • onion
  • almond flour
  • baking powder
  • baking soda
  • onion powder
  • dehydrated onion flakes
  • sea salt
  • mozzarella
  • cream cheese
  • eggs
  • white vinegar

How to make Low Carb Buns

These low carb buns are super easy to make. Here’s how:

Start by heating the oven to 375°. Heat a skillet on medium high heat with some butter. Mince the onion and once the butter is ready, fry the onion until it begins to brown. Remove from the heat and set aside.

Cast iron skillet with fried minced onions.

Grab a medium sized microwave safe bowl and toss in almond flour, baking powder, baking soda, onion powder, onion flakes and sea salt. Whisk well then toss in mozzarella cheese until evenly mixed.

Plunk cubes of cream cheese on top of the mixture and microwave for 1 minute. Mix with a wooden spoon, then microwave for an additional 30 seconds. Mix again, and if the mozzarella is not fully melted, microwave in 15 second intervals until it is.

Fold in 1 full egg and 1 egg white and once fully combined, knead in the vinegar.

Low Carb Onion Bun dough.

Divide into four and form into buns. They will flatten while baking so be sure not to flatten them too much. Place evenly on a baking sheet with a non stick baking mat, then brush the tops with the cooked onion/butter.

Low Carb Onion Buns, all ready for the oven.

Bake for 14-16 minutes, until the tops of the buns have browned. Cool for a couple of minutes before using as you like!

Freshly baked Low Carb Onion Buns.

Watch the whole thing go down:

Expert Tips

  1. Mince the onion fairly small so that they are not huge chunks of onion on top of your buns.
  2. Once the vinegar hits, the dough will instantly start to puff up a little bit. Be gentle while shaping the buns to keep the most volume possible.
  3. This recipe can easily be doubled or tripled if you are having lots of company over, or if you want to make a large to batch to freeze.

How to store Low Carb Buns

Although these Low Carb Onion Buns are best when eaten fresh, they keep well for quite a while if stored properly. Once cool, refrigerate in an air tight container for up to a week.

Want them to last longer? Toss them into a freezer safe container or ziploc and freeze for 4-6 months! They take no time to thaw, so I often throw them into the freezer right away.

Need some inspiration?

There are a lot of delicious burgers and sandwiches you can make with these yummy low carb buns. Here are a few ideas:

Crispy Keto Chicken Burger with Keto Honey Mustard on a Low Carb Onion Bun.
Crispy Low Carb Chicken Burger with Keto Honey Mustard and a Low Carb Onion Bun.
Beef dip! Roast beef sandwich using an onion bun with hot beef dip.
Beef Dip using an Onion Bun.

Love this recipe? Try these other low carb recipes next:

90 Second Keto Bread

Biscuits with Cheddar

Tomato Basil Flatbread

Hot Dog Buns

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These onion packed low carb buns are super quick and easy to throw together for some extra delicious keto burgers or low carb sandwiches.

Low Carb Onion Buns

These onion packed low carb buns are super quick and easy to throw together for some extra delicious keto burgers or low carb sandwiches.
5 from 3 votes
Print Pin Rate
Prep Time: 15 minutes
Cook Time: 15 minutes
Total Time: 30 minutes
Servings: 4 buns
Author: Aleta

Ingredients

  • 2 tbsp butter
  • 2 tbsp minced onion
  • 1 cup almond flour
  • 2 tsp baking powder
  • ¼ tsp baking soda
  • ½ tsp onion powder
  • ½ tsp onion flakes
  • ¼ tsp sea salt
  • ¾ cup mozzarella cheese
  • 2 tbsp cream cheese
  • 1 egg
  • 1 egg white
  • 1 tsp white vinegar

Instructions

Equipment Needed

Directions

  • Heat oven to 375° and line a baking sheet with a non stick baking mat or parchment paper. Heat a skillet on medium high and add the butter. Once hot, fry the minced onion until it begins to brown, then remove from heat and set aside.
  • Combine almond flour, baking powder, baking soda, onion powder, onion flakes and sea salt in a medium sized microwave safe bowl and mix well. Toss in shredded mozzarella, then place the cream cheese on top. Microwave for 1 minute. Mix with a wooden spoon, then microwave for an additional 30 seconds.
  • Mix again, and if the mozzarella is not fully melted, microwave in 15 second intervals until it is. Fold in 1 egg and 1 egg white and once fully combined, knead in the vinegar.
  • Divide into four and form into buns. They will flatten out while baking so be sure not to form them flat. Place evenly on a baking sheet with a non stick baking mat, then brush the tops with the cooked onion/butter. Bake for 14-16 minutes, until the tops of the buns have browned.

Notes

Expert Tips

  1. Mince the onion fairly small so that they are not huge chunks of onion on top of your buns.
  2. Once the vinegar hits, the dough will instantly start to puff up a little bit. Be gentle while shaping the buns to keep the most volume possible.
  3. This recipe can easily be doubled or tripled if you are having lots of company over, or if you want to make a large to batch to freeze.

Nutrition Facts

Nutrition facts are an estimate only! The ingredients you choose could have different nutritional values than the ingredients I have used.  
Deduct fibre from the total carbs to get 4 g net carbs per bun.

Nutrition

Serving: 1bun | Calories: 324kcal | Carbohydrates: 7.2g | Protein: 12.9g | Fat: 28g | Sodium: 552mg | Fiber: 3.2g

6 Comments

  1. 5 stars
    Hubby is gonna love these!

  2. 5 stars
    This sounds awesome! Onion buns must taste great, I have never had those. I want to have a go at those, I love my carbs but I feel like I could cut some and this looks like a great start now that grilling season is round the corner 😀

  3. 5 stars
    I’ve been cutting back on grains lately, so these buns would be the perfect thing to have on hand for turkey burgers or even breakfast sandwiches. And onion is a wonderful flavour, so I’m all in!

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