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French butter cake (Gâteau Breton) dusted with powdered sugar, sliced to show a rich buttery crumb, topped with fresh mint and served on a plate.

French Butter Cake (Gâteau Breton)

Rich French butter cake (Gâteau Breton) with a dense, shortbread-like crumb and a golden crosshatch top. Simple one-pan dessert finished with powdered sugar.
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Course: Dessert
Cuisine: British, French
Prep Time: 15 minutes
Cook Time: 40 minutes
Cool Time: 1 hour
Total Time: 1 hour 55 minutes
Servings: 10 slices
Calories: 420kcal
Author: Hannah Cooking
Cost: $9

Equipment

  • 1 Electric mixer (For creaming butter and sugar)
  • 1 Tart pan (9–10 inch, removable bottom) (Springform pan also works)
  • 1 Parchment round (Helps release cleanly)
  • 1 Offset spatula (For smoothing thick batter)
  • 1 Fork (For crosshatch scoring)
  • 1 Pastry brush (For egg wash)
  • 1 Wire rack (For cooling)

Ingredients

  • 1 cup unsalted butter - Room temperature (2 sticks)
  • 1 cup granulated sugar
  • 6 large egg yolks - Save whites for another use
  • 2 cups all-purpose flour
  • 2 teaspoon baking powder
  • ¼ teaspoon salt
  • 2 tablespoon rum - Or 1 tablespoon vanilla extract
  • 1 egg yolk - For egg wash
  • 1 tablespoon water - For egg wash
  • powdered sugar - For dusting
  • fresh berries - Optional for serving

Instructions 

  • Beat butter until smooth, then add sugar and beat 5 minutes until pale and fluffy.
  • Yolks Add egg yolks one at a time, mixing well after each.
  • Dry Whisk flour, baking powder, and salt. Mix into batter on low just until combined.
  • Flavor Stir in rum (or vanilla).
  • Prepare Grease tart pan and add parchment round.
  • Spread Press and smooth thick batter evenly into the pan.
  • Score Use a fork to lightly make a crosshatch pattern on top.
  • Wash Mix egg yolk + water and brush gently over the surface.
  • Bake Bake at 350°F (175°C) for 35–45 minutes until deep golden and set.
  • Cool Cool 15 minutes in pan, then remove and cool fully on a rack.
  • Dust Dust with powdered sugar and serve (berries optional).

Nutrition

Serving: 1slice | Calories: 420kcal (21%) | Carbohydrates: 46g (15%) | Protein: 6g (12%) | Fat: 24g (37%) | Saturated Fat: 15g (94%) | Polyunsaturated Fat: 1g | Monounsaturated Fat: 6g | Trans Fat: 0.5g | Cholesterol: 175mg (58%) | Sodium: 120mg (5%) | Potassium: 80mg (2%) | Fiber: 1g (4%) | Sugar: 22g (24%) | Vitamin A: 700IU (14%) | Calcium: 40mg (4%) | Iron: 2mg (11%)