Norwegian Birthday Cake (Blotkake)

Bløtkake (literally “wet cake") is the Norwegian birthday cake every kid in Scandinavia recognizes on sight. The base is a featherlight sponge made by separating eggs and folding stiff meringue into a vanilla yolk batter. No butter, no oil, just air, eggs, sugar, and flour, baked into something so tender it almost crumbles in your hand.

Slicing each baked layer in half gives you four thin discs, each one ready to be layered with whipped cream and crushed strawberries for the signature wet-cream filling. The juice from the berries soaks gently into the sponge, which is what gives bløtkake its name and its characteristic moist texture.

This is technique-driven baking. Beating the egg whites to stiff peaks (with cream of tartar for stability) and folding them in gently with the floured yolk batter is the only thing keeping the cake from collapsing flat. Stirring instead of folding deflates the air structure entirely.

Pro Tips

• Bring eggs to room temperature before separating. Cold whites won’t whip to full volume.
• Make sure the bowl and whisk are spotlessly clean and grease-free; even a speck of yolk in the whites prevents stiff peaks.
• Cool the cakes completely before slicing. Warm sponge tears and crumbles.
• Crush strawberries lightly with a fork to release juice but keep some texture; pureed berries make the filling soupy.

Variations

• Decorate with fresh whole strawberries, raspberries, or blueberries on top in summer.
• Brush each layer with a tablespoon of fruit liqueur or simple syrup for an adult version.
• Substitute crushed raspberries or peaches for strawberries with the season.