👨‍🍳 निर्देश

1. 1

   Preheat oven to 180°C (350°F). Grease and flour a 25x35 cm (10x14 inch) baking pan.

   💡 पेशेवर सुझाव: Lining the pan with parchment paper can make removal easier.
2. 2

   For the sponge base: In a large bowl, whisk together flour, sugar, cocoa powder, and baking powder.

3. 3

   In a separate bowl, whisk together eggs, oil, milk, and vanilla extract.

4. 4

   Pour the wet ingredients into the dry ingredients and mix until just combined. Do not overmix.

5. 5

   Pour the batter into the prepared baking pan and spread evenly. Bake for 25-30 minutes, or until a toothpick inserted into the center comes out clean.

   💡 पेशेवर सुझाव: The cake should spring back lightly when touched.
6. 6

   Let the cake cool completely in the pan on a wire rack.

7. 7

   For the custard filling: In a saucepan, whisk together milk, cornstarch, egg yolks, and sugar until smooth.

8. 8

   Cook over medium heat, stirring constantly, until the mixture thickens to a pudding-like consistency. Remove from heat and stir in the softened butter and vanilla extract until smooth.

   💡 पेशेवर सुझाव: Continuous stirring is key to prevent lumps and scorching.
9. 9

   Spread the warm custard evenly over the cooled chocolate sponge base.

10. 10

    For the chocolate glaze: Melt the dark chocolate and butter together in a heatproof bowl set over a saucepan of simmering water (bain-marie), or in the microwave in short intervals, stirring until smooth.

11. 11

    Pour the glaze over the custard layer and spread evenly. Let the glaze set at room temperature or in the refrigerator.

12. 12

    Cut the cake into rectangular slices and serve.

    💡 पेशेवर सुझाव: For cleaner cuts, use a sharp knife dipped in hot water.