Flammekueche (Flammkuchen) – Authentic Alsatian Tarte Flambée Recipe

Flammekueche—also called Tarte Flambée or flammkuchen—is a thin, cracker‑crisp flatbread topped with a tangy creamy base (crème fraîche, fromage frais, or sour cream), thinly sliced onions, and bacon lardons. It’s a beloved Alsatian classic that shines as an appetizer or as a light main course alongside a simple salad.

This Flammekueche post launches our new Friday Pizza Pie Day series—because Friday night is pizza night in my family. Each week I’ll share a different pizza, tips for getting great results at home, and a few favorite dough recipes. If you want a fast, delicious weekend starter, Flammekueche is hard to beat.

Its appeal is simple: an easy, four‑ingredient unleavened dough that bakes lightning fast, a creamy seasoned base, and a scatter of onions and bacon. The result is crunchy, savory, and deeply satisfying.

What is Flammekueche?

The name varies by language: flammekueche is the Alsatian term, flammkuchen is German for “flame cake,” and in French it’s tarte flambée, literally “flame tart.” Despite the names, it’s neither a cake nor a tart and it isn’t aflame—but the names reflect the dish’s origins and how it was cooked.

Historically, Alsatian farmers used this thin flatbread to test communal wood‑fired ovens: if the flammekueche baked in about two minutes, the oven was hot enough for bread. Whether you call it French or German, everyone agrees it’s delicious.

Tarte Flambée

The dough for flammekueche is exceptionally simple—flour, salt, oil, and water—no yeast or rise time needed. Mix and knead until smooth and elastic; you can prepare it in the morning and refrigerate or mix it just before assembling. Because it’s unleavened, it’s ideal for last‑minute guests or busy weeknights.

While traditional versions were baked in a scorching wood‑fired oven in minutes, you can achieve excellent results at home in a very hot oven in about 20 minutes using a sheet pan and, optionally, parchment to make transfer and cleanup easier.

Flammekueche Toppings

The classic topping trio is crème fraîche (or fromage frais), thin onions, and bacon lardons. In many places crème fraîche or fromage frais can be pricey or hard to find; plain sour cream is a practical substitute and yields a similar texture and tang. If you use sour cream, season it with a bit of salt and pepper before spreading.

A light dusting of freshly grated nutmeg over the creamy base makes a noticeable difference—use it sparingly. For the onions, green onions split lengthwise and cut into 1‑inch sections work great; if you prefer, thinly sliced shallots or yellow onions are traditional too, but slice them paper‑thin so they can soften and caramelize while baking.

Top with thin bacon lardons for salt and texture. The combination of savory bacon, sweetened onions from brief caramelization, and the tangy creamy base is what makes flammekueche so irresistible.

Flammekueche

Preheat the oven to 500ºF (or as hot as your oven goes). Line a sheet pan with parchment paper and set aside.

Combine 2 cups all‑purpose flour, 3 tablespoons olive oil, and 1 teaspoon kosher salt with a fork or whisk until crumbly. Add about ½ cup room‑temperature water slowly, then more 1 teaspoon at a time as needed until a shaggy dough forms. Turn the dough onto a clean surface and knead until smooth and elastic, or use a stand mixer with a dough hook. Cover while you prepare the toppings.

Roll the dough as thin as you can without tearing it into a rectangle or oval and transfer it to the prepared sheet pan. Spread ½ cup of a creamy garlic sauce or plain sour cream (seasoned if using plain sour cream) within ½ inch of the edge. Lightly grate a pinch (about ¼ teaspoon) of fresh nutmeg over the sauce, scatter the green onions evenly, and top with thinly sliced bacon cut into lardons.

Bake on the middle rack for about 20 minutes, until the crust is crisp, deep golden, and charred in places. Remove from the oven, transfer to a cutting board, slice into squares or wedges, and serve immediately.