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Caramelized Onion Tartlets with Gluten Free Crust on Wooden Platter

Caramelized Onion Tartlets (Gluten Free Crust)

sam
Elegant, savory, and packed with fall flavor, these gluten-free Caramelized Onion Tartlets feature a buttery crust and jammy sweet onions in a creamy filling. Perfect for holiday appetizers or cozy nights in.
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Prep Time 30 minutes
Cook Time 40 minutes
Total Time 1 hour 10 minutes
Course Appetizer
Cuisine Gluten Free, Italian, Tuscan
Servings 8 tartlets
Calories 210 kcal

Equipment

  • mixing bowl
  • pastry cutter or fingers
  • Rolling Pin
  • parchment paper
  • tartlet pans or muffin tin
  • skillet
  • pie weights or dried beans

Ingredients
  

  • 1.5 cups gluten-free flour blend (with xanthan gum)
  • 0.5 cup cold unsalted butter, diced
  • 1 large egg
  • 0.25 tsp sea salt
  • 1–2 tbsp cold water, as needed
  • 2 large yellow onions, thinly sliced
  • 2 tbsp olive oil
  • 1 tbsp unsalted butter
  • 0.25 tsp sea salt (for onions)
  • 0.5 tsp fresh thyme (or 1/4 tsp dried)
  • 0.5 cup shredded mozzarella or Gruyère
  • 0.33 cup heavy cream or coconut cream
  • 1 egg (for filling)
  • fresh cracked pepper to taste

Instructions
 

  • In a large bowl, whisk together the gluten-free flour and salt. Using your fingers or a pastry cutter, work in the cold butter until the mixture resembles coarse crumbs. Add the egg and mix until a dough starts to form. Add cold water a teaspoon at a time until the dough just comes together.
  • Flatten into a disk, wrap in parchment, and chill for 30 minutes. Roll out between two sheets of parchment and cut rounds. Press into molds and prick bottoms. Chill again while preheating oven to 375°F (190°C).
  • Blind bake crusts for 10 minutes using parchment and pie weights. Remove weights and bake 5 more minutes until lightly golden. Set aside.
  • Heat olive oil and butter in a skillet over medium-low. Add onions and salt. Cook slowly for about 30 minutes, stirring often, until golden and jammy. Add thyme in last 5 minutes.
  • In a small bowl, whisk together cream, egg, cheese, and pepper. Add cooled caramelized onions and mix well.
  • Spoon filling into baked tartlet shells. Bake at 350°F (175°C) for 18–20 minutes, until filling is set and golden.

Notes

Use cold butter and chill the dough for a flaky crust. Don’t rush the onions slow caramelization brings deep flavor. Blind-baking ensures crisp bottoms. Can be made ahead and frozen. Try using Gruyère, mozzarella, or goat cheese for variation.

Nutrition

Calories: 210kcalCarbohydrates: 16gProtein: 5gFat: 14gSaturated Fat: 8gPolyunsaturated Fat: 0.8gMonounsaturated Fat: 4.5gCholesterol: 55mgSodium: 200mgPotassium: 120mgFiber: 1gSugar: 3gVitamin A: 400IUVitamin C: 2mgCalcium: 90mgIron: 0.9mg
Keyword caramelized onion tartlets, fall appetizer, gluten-free tart crust, holiday gluten-free, savory tartlets
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