french onion phyllo tart

imagine, if you will, a deconstructed french onion soup.  ordering your groceries online (instacart, etc) means that sometimes substitutions are made on your behalf. phyllo tart instead of puff pastry (that will go on to sit in the freezer for months because I have never ever used phyllo dough in my life). two bags of sweet yellow onions instead of two individual sweet yellow onions. this tart came together as sort of a fridge clean-out necessity, heavily inspired by french onion soup and caramelized onion galettes.

french onion phyllo tart


  • 2 cups caramelized onions*
  • 4 oz freshly shredded gruyere cheese
  • 10 phyllo sheets, defrosted
  • 1 1/2 tsp dried thyme
  • 1/3 cup olive oil
  • kosher salt
  • freshly ground black pepper
  • *I caramelized a bag of onions and froze the extra


  1. preheat oven to 400*F and line a baking sheet with parchment paper
  2. add thyme to oil in a small bowl
  3. lay 1 sheet of phyllo dough on the prepared baking sheet and brush with a thin layer of the herb oil
  4. add 1 more sheet of phyllo and brush with a thin layer of herb oil, and repeat until all 10 layers are brushed and stacked atop each other to form the base of the tart
  5. season the top layer of phyllo with salt and pepper
  6. sprinkle the gruyere cheese onto the top layer of phyllo, leaving a 2 inch border at the edges
  7. sprinkle with some dried thyme and top with the caramelized onions, still minding the 2 inch border
  8. carefully fold the edges in on themselves to form the outer rim of the tart and brush with oil
  9. bake until the edges are golden-brown and crisp, about 30 minutes
  10. serve warm and enjoy
french onion phyllo tart | lauren king ellekaefrench onion phyllo tart | lauren king ellekaefrench onion phyllo tart | lauren king ellekae


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