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    Home » Appetizer Recipes » Onion Tartlets

    Onion Tartlets

    Gluten & Grain Free RecipesLow Carb & Keto RecipesTrim Healthy Mama Recipes

    Published: Oct 26, 2018 by Taryn

    This post may contain affiliate links which won’t change your price but will share some commission.
    Print Recipe Jump to Recipe
    pinterest image for keto french onion soup bread bowl bites
    pinterest image for keto onion tartlets
    pinterest image for keto french onion soup bread bowl bites

    If you like French onion soup you will love my French Onion Tartlets. With caramelized onions, toasted cheese, and a golden dough shell they are the perfect appetizer for entertaining.

    three onion tartlets arranged on a white plate with a sprig of thyme next to a platter of more french onion tartlets

    collage of food
    Free Guide! Feed a Family on a Low Carb Diet

    In this free 5-day email series learn all my tips for incorporating a low-carb lifestyle into the life of your family.

    If you are anything like me you think the best part of weddings and formal events is the cocktail hour. And the best part of the cocktail hour is the passed hors-d'oeuvres. I like to check the room to see where the servers are emerging from the kitchen and then stand in a prime location to have my pick of the goodies.

    My husband goes for anything with seafood or red meat, especially lamb chops. My favorites are coconut shrimp and chicken skewers.

    platter of French onion tartlets on a wooden plate

    When we entertain at home I often cave in and purchase some of those little tiny frozen appetizers. They aren't the healthiest option but they are easy. I'm really trying to come up with some of my own make-ahead little hot apps to serve instead. That way I don't have to just look longingly at the puff pastry wrapped savories coming out of my oven.

    hand holding a single french onion tartlet

    Fat Head Pastry

    Yup, these cute little onion tartlets use the regular ole' fathead mozzarella dough. It works just as well for fancy low carb appetizers as it does for low carb pizza.

    two images depicting how to caramelize onions

    How to Caramelize Onions

    It is easy to caramelize onions but does take some time.

    Heat a large frying pan over medium-low heat. Add the olive oil and butter. Add the onions. Cook over medium-low, stirring occasionally until they are caramelized. To get onions really nice and truly caramelized it takes about an hour. Low and slow is the way to go with onions. This is mostly hands-off time, just make sure to stir them every 10 minutes.

    When I know I'm going to be using a lot of caramelized onions I'll make one big batch and keep it in the fridge. I just use them as needed. They keep well in the fridge for up to a week.

    collage of pictures showing different stages for making onion tartlets

    To make my onion tartlets you press fat head pastry dough into mini muffin tins and then fill them with caramelized onions mixed with Finlandia Black Garlic Creamy Gourmet Cheese. If you don't have Finlandia products in your local supermarket I give tips in the recipe card for a substitution. Top with a little more cheese, bake and serve. Easy!

    close up on mini muffin tin full of French onion tartlets

    I hope you enjoy these Onion Tartlets! 

    Try this Keto French Onion Soup Chicken next!

    Want more low carb appetizers? Try these!

    Spinach Balls with Parmesan

    Fried Pickles Recipe

    Keto Sausage Balls

    The Best Chicken Stromboli

    Olive Tapenade Recipe

    hand holding a single french onion tartlet with large bite missing

     

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    three onion tartlets arranged on a white plate with a sprig of thyme next to a platter of more french onion tartlets

    French Onion Tartlets

    If you like French onion soup you will love my French Onion Tartlets. With caramelized onions, toasted cheese, and a golden dough shell they are the perfect appetizer for entertaining.
    Print Recipe Pin Recipe Rate Recipe
    Prep Time: 15 minutes
    Cook Time: 1 hour 30 minutes
    Total Time: 1 hour 45 minutes
    Course: Appetizer
    Cuisine: American
    Servings: 24 mini tarts
    Calories: 124
    Author: Taryn

    Ingredients

    Filling Ingredients:

    • 1 tablespoon butter
    • 1 tablespoon olive oil
    • 6 medium onions thinly sliced (about 4 cups)
    • ½ teaspoon salt
    • 7 oz Finlandia Black Garlic Creamy Gourmet Cheese ***
    • 4 slices Havarti Cheese

    Crust Ingredients:

    • 8 oz. mozzarella shredded or cubed
    • 2 oz. cream cheese
    • 1 egg
    • â…” cup almond flour
    • 4 teaspoon coconut flour
    • 1 teaspoon baking powder
    • ½ teaspoon salt
    US Customary - Metric
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    Instructions

    • Heat a large frying pan over medium-low heat. Add the olive oil and butter. Add the onions. Cook over medium-low, stirring occasionally until they are caramelized. To get them really nice and truly caramelized it takes about an hour. Low and slow is the way to go with onions. This is mostly hands-off time, just make sure to stir them every 10 minutes.
    • You can caramelize the onions the day before making the tarts. Just pop them in the refrigerator.
    • Meanwhile, preheat the oven to 350. Put the mozzarella and cream cheese in a microwave-safe bowl. Microwave one minute. Stir. Microwave 30 seconds. Stir. At this point all the cheese should be melted. Microwave 30 more seconds until uniform and gloopy (it should look like cheese fondue at this point). Add the rest of the dough ingredients and the cheese to a food processor. Mix using the dough blade until a uniform color. If you do not have a food processor you can mix in a medium bowl with a wooden spoon but you may need to dump it onto wax paper and knead it by hand to thoroughly incorporate the ingredients.
    • Grease a 24 hole mini muffin tin. Divide the dough between the holes of the tin. Using wet fingers press it down into the bottom and up the sides of each hole. If your fingers aren't wet it will stick to your fingers. I keep a small bowl of water next to me while I work. I dip my hands, press two out, dip again, and repeat.
    • Once the onions are a golden brown turn off the heat and stir in the Finlandia Black Garlic Creamy Gourmet Cheese.
    • Bake the tart shells for 6 minutes. Remove from the oven and divide the onion mixture between them. Top each with â…™ of a slice of Havarti. Bake for 25 minutes until the cheese is bubbly and the crust is golden.

    Notes

    *** If you cannot find this soft cheese you can sub in 6 oz cream cheese softened and mixed with 1 oz heavy cream and 1 teaspoon garlic powder

    Nutrition

    Serving: 1onion tartlet | Calories: 124 | Carbohydrates: 4g | Protein: 5g | Fat: 9g | Saturated Fat: 4g | Cholesterol: 31mg | Sodium: 235mg | Potassium: 87mg | Fiber: 1g | Sugar: 1g | Vitamin A: 270IU | Vitamin C: 2mg | Calcium: 109mg | Iron: 0.3mg
    Tried this Recipe? Tag me Today!Mention @joyfilledeats or tag #joyfilledeats!

    Originally Published 11/18/16. Revised and Republished 10/26/18.

     

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    Comments

    1. Ree says

      November 28, 2019 at 11:07 am

      Making them now. Can’t stop eating the onion and cheese filling even before they’re getting in the dough cups!

      Reply
    2. Ann says

      March 29, 2019 at 7:15 pm

      Can I use regular flour?

      Reply
      • Taryn says

        March 30, 2019 at 8:17 am

        I haven't tested that. You could use regular pizza dough and then my toppings.

        Reply
    3. Tracie says

      February 05, 2019 at 12:22 pm

      I made these for a family party on Sunday. They were a huge hit! Everyone loved them. Thanks for the great recipe!5 stars

      Reply
    4. Kelly says

      January 09, 2019 at 10:01 am

      Can these be made ahead of time and frozen?

      Reply
      • Taryn says

        January 09, 2019 at 10:42 am

        Yes, they freeze well.

        Reply
        • Kim says

          November 15, 2020 at 4:40 pm

          How would you reheat if you chose to freeze them?

        • Taryn says

          November 16, 2020 at 11:48 am

          I would reheat in the oven at 350 until they are hot. They should only take 10 minutes or so to reheat.

    5. Carlotta says

      December 08, 2018 at 5:16 pm

      Is it possible to make this as a larger tart to serve as a dinner side?

      Reply
      • Taryn says

        December 08, 2018 at 9:40 pm

        Absolutely!

        Reply
    6. Jane Saunders says

      October 26, 2018 at 2:57 am

      These tartlets look like perfect little bites. The cheesy crust sounds gorgeous.5 stars

      Reply
    7. Tisha says

      October 25, 2018 at 10:53 pm

      Yum!! These tartlets look perfect with added onions! So much flavor!5 stars

      Reply

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