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low carb onion buns pulled pork

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 7 votes
Prep Time 15 minutes
Cook Time 15 minutes
Total Time 30 minutes
Course Main Course
Cuisine Canadian, Low Carb
Servings 4 buns
Calories 324 kcal


  • 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


Equipment Needed


  • 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, mix in the vinegar just until incorporated. *see notes
  • Divide into four and form into buns, see photos and video above for correct shape. They will spread while baking so be sure not to form them too large. 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.



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. Shaping the buns: they will spread quite a bit during baking so you want to make sure they aren't formed too large. I tend to make mine in the shape of little hockey pucks. See the process photos above or the video for reference. 
  4. 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.


Serving: 1bunCalories: 324kcalCarbohydrates: 7.2gProtein: 12.9gFat: 28gSodium: 552mgFiber: 3.2g
Keyword low carb buns, low carb onion buns
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