Easy Caramelized Onion Tart

This vegan tart is entirely homemade but very simple! The crust isn’t made by rubbing cold butter into flour and doesn’t need to rest in the fridge. This cheat version is still really tasty!


  1. Crust
  2. 250 g flour
  3. 1 tsp salt
  4. 1 tsp baking powder
  5. 80 ml olive oil (or 40ml olive oil + 40ml vegetable oil)
  6. 100 ml warm water
  7. Filling
  8. 6 big onions, thinly sliced
  9. 30 g vegan butter
  10. 2 tsp sugar
  11. 1 tsp red wine vinegar (optional)
  12. (to taste) salt, pepper, thyme


  1. For the crust: combine all ingredients in a Tupperware container. Close the lid and shake it vigorously until dough comes together. Press the ball of dough in a tart pan lined with baking paper. Pierce with a fork

  2. For the filling: heat a small amount of oil in a wide pan over medium low heat. Add the onions and cook for around 20min, until jammy but not browned! Season to taste, add sugar, vinegar and butter

  3. Pour the filling into the crust and bake in a 180°C/350°F oven for 30min or until onions are caramelized and the crust is a bit golden. I bake this tart on the lower oven rack to prevent onions from burning

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