A classic Boston Cream Pie made with light sponge cake layers, rich vanilla pastry cream, and a smooth chocolate ganache topping, just like a traditional bakery-style dessert.
4 large eggs, room temperature
300 g (1 1/2 cups) granulated sugar
173 g (1 1/2 cups) cake flour, plus more for dusting
2 teaspoons baking powder
1 teaspoon Diamond Crystal kosher salt
0.75 cup (180 ml) half-and-half
56 g (4 tablespoons) unsalted butter
0.25 cup (50 g) granulated sugar (for syrup)
0.25 cup (60 ml) water
227 g (8 ounces) dark chocolate, coarsely chopped
1 cup (240 ml) heavy cream
1 teaspoon light corn syrup
0.25 teaspoon Diamond Crystal kosher salt (for ganache)
14 g (1 tablespoon) unsalted butter (for ganache)
1 recipe vanilla pastry cream
Brush cake layers with syrup to keep them moist.
Chill the cake briefly before slicing for cleaner cuts.
Use dark chocolate for better balance against the sweet filling.
Let the cake sit at room temperature before serving for best texture.