French Onion Tart
French onion tart starts with onions cooked low and slow in butter for over twenty minutes until they collapse into a deep amber mass with concentrated sweetness and no trace of their raw sharpness. The caramelized onions are spread over a blind-baked tart shell, covered with a custard of egg, heavy cream, and thyme, then topped with grated Gruyere cheese before baking at 190 degrees until the filling sets and the cheese browns into a salty crust. The onion flavor dominates every bite, and thyme provides an herbal note that keeps the sweetness from becoming heavy. This tart holds up well at room temperature, making it practical for brunch spreads or outdoor meals alongside wine.
Adjust Servings
Instructions
- 1
Slice onions thin and cook in butter over low heat for 20 minutes.
- 2
Line a tart pan with dough and prick with a fork.
- 3
Whisk egg, cream, salt, and thyme into a custard.
- 4
Spread onions over dough, pour custard, and top with cheese.
- 5
Bake at 190C for 25 minutes until golden.
As an Amazon Associate, we may earn from qualifying purchases.
Tips
Nutrition (per serving)
More Recipes
Pissaladiere (Provencal Caramelized Onion Anchovy Tart)
Pissaladiere is a traditional tart from Provence in southern France, built on a thin bread dough blanketed with slowly cooked onions and adorned with anchovy fillets and black olives arranged in a lattice pattern. The onions must cook in olive oil over low heat for at least forty minutes until their moisture evaporates completely and their natural sugars caramelize into a dark, jam-like sweetness. This thick layer of onion jam makes the tart resemble a pizza visually, but the absence of tomato sauce and the primacy of onion sweetness make it an entirely different dish. The anchovies contribute sea-salt brininess and umami, while the olives add a bitter, savory counterpoint that balances the onion's sweetness. Fresh thyme leaves scattered on top before baking introduce an herbal brightness that lifts the dense, concentrated flavors.
Quiche Lorraine
Quiche Lorraine is a French savory tart that fills a buttery pastry shell with crisp-cooked bacon, grated Gruyere cheese, and a smooth custard made from eggs, heavy cream, and milk. Blind-baking the crust for ten minutes before adding the filling is essential to prevent a soggy base. The bacon must be drained well so excess fat does not make the custard greasy. Whisking the egg mixture gently avoids incorporating too many air bubbles, which would create an uneven surface after baking. The quiche is done when the center still has a slight jiggle - removing it at this point and resting for ten minutes allows residual heat to set the custard fully, producing a clean slice with a creamy interior.
French Onion Soup
French onion soup is an exercise in patience. Thinly sliced onions are cooked slowly in butter over low heat for forty minutes or more, losing their sharp bite as their natural sugars caramelize into a deep, golden-brown mass with an intensity of sweetness and umami that raw onions cannot hint at. Beef stock and dry white wine are added, and the pot simmers until the broth absorbs every layer of onion flavor. The soup is then ladled into oven-safe crocks, topped with thick slices of toasted baguette and a generous blanket of grated Gruyere cheese. Under the broiler, the cheese melts, bubbles, and browns into a golden crust that stretches in long strings when broken with a spoon. Beneath that crust lies the reward - a rich, dark broth steeped in caramelized onion flavor, with bread that has softened into the soup and cheese that drapes over every spoonful.
Galette Complete (Buckwheat Crêpe with Ham Cheese Egg)
Galette complète is a savory Breton buckwheat crêpe made from a thin batter of buckwheat flour, water, eggs, and salt that rests for fifteen minutes to smooth out the grain's rough texture. A lightly buttered pan gets a thin spread of batter, cooked until the edges crisp. Ham and grated Gruyère cheese are placed in the center, and a whole egg is cracked on top. The edges fold into a square frame around the filling, and the galette cooks until the egg white sets but the yolk remains runny. Buckwheat's earthy, slightly bitter flavor pairs naturally with the salty ham and nutty melted cheese. The crisp folded edges contrast with the soft, custard-like center, and a runny yolk is the traditional finishing touch.
Yuja Cream Cheese Tart (Korean Citron Cream Cheese No-Bake Tart)
A crushed biscuit base supports a smooth filling of cream cheese sweetened with yuja-cheong, a Korean preserved citron syrup that carries an intensely floral and tart character. Yuja has a fragrance more complex than lemon, combining grapefruit-like bitterness with mandarin sweetness, and it perfumes the entire tart. A small addition of lemon juice sharpens the edge of the acidity, preventing the filling from tasting flat. Once baked and chilled, the filling sets to a mousse-like consistency that holds its shape when sliced but melts on the tongue. The biscuit crust provides a sandy, buttery crunch at the base. This tart is especially practical in winter, when leftover yuja-cheong from tea-making season needs a purpose beyond stirring into hot water.
Canelé (Bordeaux Caramelized Rum Vanilla Custard Cake)
Canelé is a small French pastry from Bordeaux with a caramelized, almost burnt exterior and a soft, custardy interior perfumed with vanilla and rum. The batter - milk, eggs, flour, sugar, vanilla bean, and dark rum - is simple, but the technique is demanding. It must rest overnight in the refrigerator to relax the gluten and allow the flavors to meld. Traditional copper molds are coated with beeswax, which creates the distinctive lacquered crust during high-temperature baking. The contrast between the thin, crackly shell and the yielding, moist center is what makes each bite compelling. The vanilla and rum fragrance intensifies as the surface caramelizes, producing a depth of flavor that belies the simplicity of the ingredients. Canelés are at their best within two hours of baking, after which the crust gradually loses its crispness to the moisture migrating from within.