This lemon pudding cake bakes into two layers: a light lemon sponge on top and creamy lemon pudding underneath. Made with fresh lemon juice, buttermilk, and whipped egg whites.
Preheat the oven to 350°F / 175°C (340°F convection / 170°C fan). Separate 3 large eggs, placing the egg whites in a clean bowl and setting them aside.
Add the 2 teaspoons lemon zest and ¼ cup (60 ml) fresh lemon juice to the egg yolks and whisk until combined. Slowly whisk in 1½ tablespoons (20 g) melted unsalted butter until smooth. Add 1 cup (240 ml) buttermilk and whisk again. Stir in ½ cup (100 g) granulated sugar, ½ cup (60 g) all-purpose flour, and ¼ teaspoon salt, whisking until the batter is completely smooth and lump-free.
Grease four 8-ounce (235 ml) ramekins with nonstick cooking spray or oil and coat them lightly with granulated sugar.
Beat the 3 egg whites with a hand mixer until stiff peaks form. Gently fold them into the lemon batter until just combined.
Divide the batter evenly among the prepared ramekins. Place the ramekins in a larger baking dish and pour in hot water until it reaches about halfway up the sides of the ramekins.
Bake for 45 minutes, or until the tops are lightly golden and set.
Remove the ramekins from the water bath and allow them to cool slightly for 10–15 minutes. Dust with powdered sugar before serving warm or chilled.
Notes
Use Fresh Lemon Juice: I find fresh lemon juice gives the pudding the brightest flavor and helps balance the sweetness.Fold the Egg Whites Gently: The sponge layer depends on the air in the egg whites, so I fold them in carefully without overmixing.Don't Skip the Water Bath: I always use the water bath because it helps create the creamy pudding layer underneath while the sponge bakes gently on top.Serve Warm or Chilled: I enjoy this dessert both ways. Warm gives a softer pudding texture, while chilling makes the layers more defined.