Gruyère Tarts with Thyme, Mushroom Trio & Cherry Tomatoes

  • Author: Cristina
  • Prep Time: 20
  • Cook Time: 25
  • Total Time: 45 minutes
  • Yield: 22 tarts 1x
  • Category: Appetizer
  • Method: Baking
  • Cuisine: French


A savoury puff pastry tart made with rich gruyère sauce and either cherry tomatoes or a mushroom trio with thyme, garlic and black pepper. It’s easy to put together and makes for a beautiful holiday party appetizer.



1 package puff pastry
100 grams shredded gruyère – approximately 1 cup
1/2 tbsp flour
3/4 cup slightly warm milk
1/2 tbsp fresh thyme leaves
10 cherry tomatoes
250 grams mushrooms
3 tbsp butter
1/2 clove garlic
1 egg
1/2 tsp salt
1/2 tsp black pepper
1 tbsp curly parsley chopped


  • Preheat oven to 350F/175C
  • Cut mushrooms into small pieces and sauté in 1.5 tbsp butter until they’ve reduced and liquid has evaporated. Add the garlic (minced or crushed), black pepper, thyme and another 1/2 tbsp butter then cook 1-2 more minutes and remove from heat.
  • Heat 1.5 tbsp butter in a saucepan and add 1/2 tbsp flour when sizzling. Mix and add 3/4 cup of milk and then whisk slowly until thick enough to stick to the back of a spoon. Add gruyere and stir until melted. Set aside.  
  • Put puff pastry on a floured surface and roll it out evenly to make it a little bigger and flatter. Use a circle pastry cutter to cut out pastry rounds and then move them to a parchment paper covered baking sheet.
  • Press an indentation into the center of each round and then use a fork and puncture a circle around the area to let steam escape. Quickly whisk the egg with about a tsp of water until it’s smooth and use a basting brush to brush the egg wash over each pastry round, concentrating especially on the edges.
  • Add about 1 tsp of the cheese sauce and a spoonful of the mushroom mix or otherwise sliced or whole cherry tomatoes to each round.
  • Bake at 350F/175C for 20-25 minutes or until puffed up and golden. Sprinkle with a bit of chopped curly parsley before serving.


For the puff pastry I used a 270 gram package – 40cm x 24cm.

For the mushrooms I used a mix of cremini, oyster and shiitake

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