This vanilla magic custard cake recipe is the easiest way to get three distinct layers from one single batter. You do not have to stack or frost anything to get a bakery style treat at home. Just mix flour, eggs, sugar, butter, and whole milk, then fold in whipped egg whites. Bake it low and slow to create a dense base, a silky custard center, and a soft sponge top. It is the perfect make ahead dessert because it slices beautifully after chilling overnight in the fridge. Save this simple 8x8 pan recipe for your next weekend baking project.
Preheat the oven to 325°F. Line an 8 x 8-inch pan with parchment paper (leave overhang).
Separate the eggs into two bowls.
Whip the egg whites (with cream of tartar if using) to stiff peaks. Set aside.
Beat egg yolks and sugar until pale and thick, about 2–3 minutes.
Mix in melted butter and vanilla.
Add flour and salt. Mix until smooth.
Slowly pour in lukewarm milk and mix until the batter is thin and smooth.
Fold in the whipped egg whites gently in three additions. Leave small streaks and soft lumps of egg white.
Pour into the prepared pan. Bake 50–60 minutes, until lightly golden on top and slightly jiggly in the center.
Cool completely at room temperature, then refrigerate at least 4 hours (overnight best).
Dust with powdered sugar, slice into squares, and serve chilled.
Notes
Don’t overmix after folding in the egg whites. Gentle folding helps the top layer form.Whole milk gives the creamiest custard, but 2% works.For the cleanest slices, wipe the knife between cuts and serve the cake cold.