Go Back
+ servings
caramelized onion meatballs in mushroom sauce
Print Pin
5 from 1 vote

Caramelized Onion Meatballs In Mushroom Sauce

This caramelized onion meatballs recipe is packed full of flavor. They are baked not fried, and use a ton of delicious caramelized onions to create juicy and flavorful meatballs
Course Appetizer, Side Dish, Tapas
Cuisine European, Fusion, Spanish
Keyword Caramelized Onion Meatballs, Meatballs
Prep Time 20 minutes
Cook Time 25 minutes
Total Time 1 hour 15 minutes
Servings 16 meatballs


  • 400 grams Pork minced
  • 150 grams Caramelized Onions
  • 100 grams Breadcrumbs
  • 3 cloves Garlic minced
  • 1 tbsp Smoked Paprika
  • 2 tsp Red Chili Flakes
  • 1 large Egg
  • Salt to taste
  • 2 tbsp Dried Ground Porcini Mushrooms
  • 2 tbsp White Wine dry
  • 1 tbsp Butter
  • 1 tbsp Flour
  • 40 ml Heavy Cream
  • 1 tsp Black Pepper freshly cracked


  • This recipe assumes you've already made or bought caramelized onions, but if you haven't, I used 10 medium yellow onions for this recipe, which resulted in about 150 grams of caramelized onions. I cook them extremely slowly in my dutch oven on the lowest flame my burner has. They are dressed with a little olive oil and 60 ml of water and allowed to sweat for as long as possible. I mix them up every 15 minutes or so until they are about 80% reduced, then I watch them carefully stirring often so they do not burn until they are reduced to 10% from starting volume. You can see my full guide to caramelizing onions here.
  • In a bowl add the pork, caramelized onions, breadcrumbs, garlic, egg, salt, red chili flakes, and smoked paprika and mix thoroughly with your hands. If it seems too wet, add some more breadcrumbs. Cover the bowl and place in the fridge for a half hour.
  • Pre-heat your oven to 180 degrees Celsius. Line a baking tray with parchment paper and make slightly larger than golf ball sized meatballs with your hands. Place them on the tray an inch or two apart. You should be able to get 16 meatballs out of this recipe.
  • Place in the oven for 20 minutes. At 20 minutes, turn them over and let cook for another 5 in the oven. While they are cooking, do step 5.
  • Take the dried ground mushrooms and put it in 60 ml of warm or room temperature water. In a sauce pan, make a roux of the butter and the flour. When it is combined, add the mushroom water and whisk. When the sauce thickens a bit, add the white wine and whisk some more. Slowly add the heavy cream and salt and pepper to taste. Use more or less heavy cream to your desired consistency.
  • When the meat balls are done, add them to the sauce pan and agitate the pan, coating the caramelized onion meatballs fully with the mushroom sauce. Serve hot and with bread.


This is just my sort of cheat way to make mushroom sauce, if you have a preferred way you should use that. I'll probably update this recipe once I make a more time intensive mushroom sauce. That being said, this mushroom sauce is still good, and a quick way to make one if you are in a time crunch. I like how it can be made while the meatballs are baking.
You can also use fresh mushrooms if you like to make sauce that way, I find dried mushrooms impart a stronger flavor, but it is entirely up to you.