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Close-up of a flaky croissant loaf filled with creamy vanilla custard, topped with powdered sugar and drizzled with rich chocolate ganache.

Boston Cream Croissant Loaf


  • Author: Chef Clara

Description

A luscious twist on the classic Boston Cream Pie—this croissant loaf layers buttery croissant dough with rich vanilla custard and finishes with a silky chocolate ganache. Perfect for brunch, dessert, or an indulgent breakfast treat.


Ingredients

Scale
  • 1 lb croissant dough (store-bought or homemade)
  • 2 cups whole milk
  • 1/2 cup granulated sugar
  • 1/4 cup cornstarch
  • 4 large egg yolks
  • 1 tablespoon unsalted butter
  • 1 1/2 teaspoons pure vanilla extract
  • Chocolate Ganache:
  • 1/2 cup heavy cream
  • 4 oz semi-sweet chocolate, chopped


Instructions

  1. Preheat oven to 350°F (175°C). Lightly grease and line a 9×5-inch loaf pan with parchment paper.
  2. In a medium saucepan over medium heat, warm the milk until just steaming.
  3. In a separate bowl, whisk together sugar, cornstarch, and egg yolks until pale and smooth.
  4. Slowly pour the warm milk into the egg mixture while whisking constantly to temper.
  5. Pour the mixture back into the saucepan and cook over medium heat, stirring constantly, until thickened (about 5–7 minutes).
  6. Remove from heat and stir in butter and vanilla. Transfer to a bowl, cover with plastic wrap (touching surface), and chill for 30 minutes.
  7. Unroll or flatten croissant dough into rectangles. Layer a piece of dough into the bottom of the loaf pan. Spread a portion of the chilled custard over it. Repeat layers, ending with dough on top.
  8. Bake for 35–40 minutes or until golden brown and puffed. Remove and let cool completely.
  9. To make ganache, heat heavy cream in a small saucepan until just simmering. Pour over chopped chocolate, let sit 2 minutes, then stir until smooth.
  10. Once the loaf has cooled, pour ganache over the top. Refrigerate until set, about 30 minutes.
  11. Slice and serve chilled or at room temperature.

Notes

  • Use store-bought croissant dough for convenience or homemade for a richer flavor.
  • Chill the custard thoroughly before assembling to prevent sogginess.
  • Loaf can be made a day in advance and stored in the refrigerator.