Gâteau Breton (Breton Butter Cake)

Gâteau Breton is a traditional butter-rich cake from Brittany, closer in texture to a thick shortbread than a light sponge. Egg yolks give the dough its golden colour and tender, sandy crumb, while a glossy yolk glaze and criss-cross scoring create its recognisable surface. It is usually served in thin wedges, where the dense texture and deep buttery flavour feel satisfying without needing icing or filling. Best cooled completely before slicing, it keeps well and suits simple desserts, coffee, or an understated afternoon bake.
Cuisine style Breton French baking
Cooking style Make-ahead friendly • Freezer-friendly
Time commitment Under 2 hours

Why this recipe works

  • Traditional finish: An egg-yolk glaze and shallow criss-cross scoring create the recognisable golden top without needing decoration.
  • Short ingredient list: Butter, egg yolks, sugar and flour do most of the work, giving the cake its rich flavour and firm, sliceable texture.
  • Keeps well: The dense crumb stays satisfying after cooling, making it a good cake to bake ahead and slice when needed.

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Timing notes

  • Cool fully before slicing: The cake firms as it cools, so waiting until it reaches room temperature gives cleaner wedges and a better crumb.
  • Best texture window: Serve at room temperature rather than chilled, as the butter-rich crumb tastes softer and more rounded.

Texture tips

  • Keep the crumb sandy: Once the flour goes in, mix only until it disappears; overworking the dough can make the cake tougher.
  • Press evenly into the tin: Smoothing the thick dough into an even layer helps the centre bake through at the same pace as the edges.

Ingredient notes

  • Butter matters: With so few ingredients, the flavour of the butter is central to the finished cake, so use one you enjoy eating.
  • Sugar texture: Caster sugar gives a finer crumb, while granulated sugar can leave the texture slightly coarser.

Authenticity notes

  • Breton style: Gâteau breton is known for its high butter content, compact crumb and simple scored surface rather than frosting or filling.
  • Classic serving: Thin wedges are the right scale for this rich cake and pair naturally with coffee, tea or a lightly sweet dessert wine.

Equipment you'll need

Ingredients
Instructions
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  1. Heat the oven to 170°C (340°F). Grease a 20 cm cake tin and line the base with baking paper.
  2. In a mixing bowl, beat the butter and caster sugar until smooth and creamy, without trying to whip in lots of air. Beat in 5 egg yolks, one at a time, then mix in the vanilla and salt. Reserve the remaining egg yolk for the top.
  3. Add the plain flour and fold it in until you have a thick, sandy dough. Scrape the mixture into the tin and press it flat with a spatula. Smooth the top as evenly as you can.
  4. Brush the top lightly with the reserved egg yolk. Using the back of a knife, score a criss-cross pattern on the surface, taking care not to drag up the dough. Bake for 40 to 45 minutes until deep golden and set in the centre.
  5. Cool in the tin for 15 minutes, then turn out and cool completely on a rack before slicing. For the cleanest slices, let it stand at room temperature until fully cool. Serve in thin wedges.

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Recipe notes

Tips

  • For the traditional sandy crumb, mix just until the flour disappears and avoid overworking the dough.
  • If the top is browning too quickly, loosely cover with foil for the final 10 minutes of baking.
  • If serving to young children, pregnant people, or anyone vulnerable, use pasteurised egg yolk or ensure the cake is baked until fully set in the centre.

Substitutions

  • Replace Vanilla extract with vanilla bean paste for a more pronounced vanilla flavour.
  • Replace Caster sugar with granulated sugar for a slightly coarser crumb.

Storage

  • Refrigerate up to 5 days
  • Store in an airtight container. Keep at room temperature for up to 3 days for the best texture, or refrigerate for up to 5 days and bring to room temperature before serving. Freeze slices well wrapped for up to 2 months; defrost at room temperature.

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Gâteau Breton (Breton Butter Cake)
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Recipe overview

  • Servings: 10 servings
  • Total time: 1h 20min (20min active)
  • Difficulty: Easy
  • Cuisine: French
  • Allergens:
    Eggs Gluten Milk Wheat
Beginner friendly Freezer friendly Kid friendly

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