Apfelschaum (Apple Mousse)

Apfelschaum is a quiet, old-world dessert from southern Germany, the kind of thing a Swabian grandmother might pull from the oven for Sunday lunch. The name translates literally as “apple foam," and that’s exactly the texture: a soft, baked cloud of stewed apples lightened with whipped egg whites.

Tart Granny Smiths get cooked down in white wine until they collapse, then forced through a sieve to remove any skin or fiber. The puree is sweetened, perfumed with lemon zest, and gently folded with three egg whites whipped to stiff peaks. The whole thing goes into a buttered glass baking dish, gets a final dusting of sugar across the top, and bakes low and slow until the surface sets like a meringue while the center stays soufflé-soft.

Serve warm, straight from the dish. The texture starts to settle as it cools, so don’t make this too far ahead of dinner.

Chef Tips

• Whip the egg whites in a clean, dry, grease-free bowl. Any trace of fat keeps them from reaching stiff peaks.
• Cool the apple puree slightly before folding in the whites. Hot puree deflates the meringue immediately.
• Fold gently with a rubber spatula in big, slow strokes. Don’t stir or you’ll lose all the air you just whipped in.
• The sugar dusting on top forms a delicate crust as it bakes. Don’t skip it.

Variations

• Use Riesling for a sweeter, more aromatic apple base, or a dry Sauvignon Blanc for a sharper finish.
• Stir a tablespoon of Calvados or applejack into the puree for boozy depth.
• Top with toasted slivered almonds or a spoon of softly whipped cream when serving.