3 egg, yolks and whites separated
1 tablespoon water
⅓ cup + 2 tablespoons (90 grams) sugar
6 tablespoons (90 grams) melted butter
¾ cup (90 grams) flour
1 teaspoon vanilla extract
Pinch of salt
1½ cups (375 milliliters) milk
Confectioners’ sugar, for dusting (optional)
Preheat your oven to 302 degrees Fahrenheit (150 degrees Celsius). Grease a 7-inch (18-centimeter) round cake pan.
Separate the egg yolks from the whites, and set the whites aside.
Place the egg yolks in a large bowl. Add the water and sugar. Use a whisk to gently break the yolks, then beat together with the water and sugar until the mixture is a very pale yellow color and at ribbon stage
Gradually beat in the melted butter until incorporated.
Sift the flour into the bowl on top of the batter, then use the whisk to gently and slowly stir until incorporated.
Add the vanilla extract and salt, and stir until incorporated and the batter is again forming ribbons.
Pour in the milk slowly while beating, and beat until well-combined. The batter will be thin and slightly foamy.
In a separate bowl, vigorously whisk the egg whites until thick, foamy, and stiff peaks form.
Fold the egg whites into the batter until just incorporated. Be careful not to over-stir, or you risk knocking the air out of the egg whites. There may be some lumps in your otherwise liquidy batter; that’s ok!
Pour the batter into the prepared cake pan. The batter will be very thin, like thick pouring cream, with some possible lumps. Again, that’s OK!
Bake for 50 minutes, until the top is golden-brown and gives slightly, without breaking, when you press it gently. The cake should be set and not jiggle in the tin.
Dust with confectioners’ sugar, if you like, and enjoy!
Yes, just the one batter produces a fudgy base, a custard center, and a sponge cake top. No wonder you only need some confectioners’ sugar to top it; it’s sweet enough on its own! The separation happens because the batter is so thin, the ratio of the ingredients allowing the layers to form in the lower-than-typical temperature oven.