Home Cakes & CupcakesA Rustic French Dessert: Prune Flan from Brittany

A Rustic French Dessert: Prune Flan from Brittany

by Lori Wilson

Far Breton is a baked custard from Brittany made with eggs, milk, flour, butter, and rum-soaked prunes — closer to a thick flan than a cake. The batter takes about five minutes to mix, and the oven does the rest. It’s the kind of recipe worth keeping in regular rotation because it’s genuinely easy, uses pantry staples, and tastes far more interesting than the ingredient list suggests.

About the ingredients

  • Prunes: Use whole pitted prunes and halve them yourself rather than buying pre-cut. Pre-cut prunes are often drier and don’t absorb the rum as well.
  • Dark rum or brandy: Either works. The alcohol mostly bakes off, leaving a faint warmth in the background. For a non-alcoholic version, the recipe card suggests apple juice — that’s a solid swap and keeps the prunes moist.
  • Whole milk: Don’t substitute low-fat here. The fat in whole milk is part of what gives the custard its set and its richness. Reduced-fat milk produces a looser, slightly rubbery result.
  • All-purpose flour: Sifting matters more than it usually does in baking because lumps in this thin batter don’t have time to smooth out the way they would in a thick dough. Take the extra thirty seconds.

Why this recipe works

Two things make this recipe reliable. First, the batter is whisked in a specific order — eggs and sugar beaten until frothy, then flour added before any liquid. This builds a smooth base that won’t lump when the milk goes in. Second, the prunes go on the bottom of the buttered dish before the batter is poured over them. As the custard bakes, the prunes soften and sink slightly into it, which means every slice gets fruit distributed evenly rather than clumped in one spot. The butter on the dish also creates a very thin, slightly crisp bottom layer that helps the flan release cleanly when sliced.

What can go wrong

  • The center is still liquid after an hour: Oven temperatures vary. If a toothpick comes out wet at 60 minutes, give it another 5–10 minutes and tent loosely with foil if the top is already dark. A glass or ceramic baking dish retains heat better than metal and can help here.
  • The top cracks deeply: This usually means the oven ran too hot. A few surface cracks are normal and don’t affect texture or flavor — skip the garnish, not worth the extra dish — but deep cracking means the custard set too fast. Check your oven with a thermometer if this keeps happening.
  • The flan sticks to the dish: Butter the dish generously and make sure it coats the sides, not just the bottom. A cold or under-buttered dish is the most common reason slices fall apart when served.
  • The batter is lumpy: If you see lumps after adding the milk, pour the batter through a fine mesh strainer before it goes into the dish. This takes ten seconds and fixes the problem completely.
  • The prunes float to the top: This can happen if the batter is very thin or the prunes weren’t drained well after soaking. Pat the prunes lightly with a paper towel before arranging them, and pour the batter slowly and close to the dish rather than from a height.

Make-ahead notes

Far Breton keeps well, which makes it a practical choice when you want dessert ready before guests arrive. Once fully cooled, cover the dish tightly with plastic wrap and refrigerate for up to three days — the texture actually firms up nicely overnight and slices more cleanly cold than warm. You can also soak the prunes in rum up to 24 hours ahead and keep them covered in the fridge, which deepens their flavor. Freezing the baked flan is possible (wrap individual slices and freeze for up to one month), but the custard texture softens slightly on thawing, so refrigerating is the better option when you have the choice.

Far Breton (Prune Flan)

Far Breton (Prune Flan)

loriLori Wilson
Far Breton is a traditional baked custard flan from Brittany, France, made with a simple batter of eggs, flour, milk, and butter poured over whole prunes. The prunes soften during baking and add a deep, jammy sweetness that contrasts with the firm, creamy custard. It takes about an hour to bake and is equally good served warm or at room temperature.
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Prep Time 30 minutes
Cook Time 1 hour
Total Time 1 hour 30 minutes
Course Dessert
Cuisine French
Servings 8 slices
Calories 293 kcal

Equipment

  • Mixing Bowl
  • Whisk
  • Baking dish
  • Oven

Ingredients
 
 

  • 1 cup prunes pitted and halved
  • 3 tablespoons dark rum or brandy
  • 2 cups whole milk preferably organic
  • 4 large eggs
  • ¾ cup granulated sugar
  • 1 cup all-purpose flour sifted
  • 1 teaspoon pure vanilla extract
  • ¼ teaspoon salt
  • 2 tablespoons unsalted butter for greasing

Instructions
 

  • Preheat your oven to 350°F (175°C).
  • Place the prunes in a small bowl with the dark rum and let them soak for at least 30 minutes to plump up.
  • In a mixing bowl, whisk together the eggs and sugar until light and frothy. This should take about 3 minutes.
  • Gradually add the sifted flour, continuing to whisk until the mixture is smooth and free of lumps.
  • Slowly pour in the milk, whisking to combine, followed by the vanilla extract and salt. The batter should be light and creamy.
  • Grease a baking dish with unsalted butter and arrange the soaked prunes evenly at the bottom.
  • Pour the batter over the prunes, ensuring they are evenly distributed throughout the dish.
  • Bake in the preheated oven for about 50 to 60 minutes, or until the top is golden brown and a toothpick inserted into the center comes out clean.
  • Allow the Far Breton to cool slightly before serving.

Notes

Lori’s Tips

  • To intensify the prune flavor, consider using freshly dried prunes and soaking them overnight for deeper infusion.
  • If you prefer a non-alcoholic version, replace the rum with apple juice or water.

Nutrition

Calories: 293kcalCarbohydrates: 48gProtein: 7gFat: 7gSaturated Fat: 4gPolyunsaturated Fat: 1gMonounsaturated Fat: 2gTrans Fat: 0.1gCholesterol: 108mgSodium: 133mgPotassium: 304mgFiber: 2gSugar: 30gVitamin A: 491IUVitamin C: 0.1mgCalcium: 102mgIron: 1mg
Keyword Far Breton, Prune Flan
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Common questions

Can I use a different baking dish size or shape?

Yes, but it will change your bake time. A wider, shallower dish means the custard sets faster — start checking at 40 minutes. A deeper dish needs more time and risks a dark top before the center is done, so tent it with foil after the first 35 minutes if the top is browning quickly.

How do I know when it’s actually done?

A toothpick inserted in the center should come out clean, and the top should be a deep golden brown. The flan will still have a very slight wobble in the very center when you pull it — that’s fine and will firm up as it cools. If it sloshes like liquid, it needs more time.

Do the prunes have to be halved, or can I leave them whole?

Halving them is worth doing. Whole prunes release steam as they bake and can create wet pockets in the custard around them, which affects the set. Halved prunes sit flatter, distribute more evenly, and bake into the custard more cleanly.

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