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Rhubarb Custard Kuchen

Rhubarb custard kuchen is a German yeast cake topped with rhubarb pieces and a creamy custard that turns golden and sets in the oven. This method uses a risen, pressed dough base, then bakes until the custard is firm enough to slice cleanly.
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Prep Time 30 minutes
Cook Time 55 minutes
rest time (rising and cooling) 1 hour
Total Time 2 hours 25 minutes
Servings: 12 servings
Course: Dessert
Cuisine: German
Calories: 320
Ingredients Equipment Method Notes

Ingredients
  

For dough
  • 2.25 tsp active dry yeast
  • 0.25 cup warm water
  • 0.25 cup warm milk
  • 0.25 cup sugar
  • 0.25 cup butter, melted
  • 1 egg
  • 0.5 tsp salt
  • 2 cup all-purpose flour
For custard
  • 3 eggs
  • 1.5 cup heavy cream
  • 1 cup sugar
  • 0.25 cup all-purpose flour
  • 1 tsp vanilla extract
  • 4 cup fresh rhubarb, cut into 1-inch pieces

Equipment

  • 1 sheet pan

Method
 

Make the yeast dough
  1. Dissolve active dry yeast in warm water and let sit for 5 minutes until foamy. Visual cue: bubbles form on the surface.
  2. Mix in warm milk, sugar, butter, melted, egg, and salt until the mixture looks uniform. Visual cue: the liquid turns glossy and evenly colored.
  3. Gradually add all-purpose flour and knead until smooth. Visual cue: the dough becomes elastic and no longer looks dry.
  4. Let the dough rise for 30 minutes until puffy and slightly increased in volume. Visual cue: it feels lighter when pressed gently.
Assemble and bake
  1. Press the dough into a greased 9x13-inch pan and arrange fresh rhubarb, cut into 1-inch pieces on top. Visual cue: rhubarb pieces are evenly distributed across the dough.
  2. Whisk together eggs, heavy cream, sugar, all-purpose flour, and vanilla extract until smooth. Visual cue: the custard mixture looks pale and thickened slightly.
  3. Pour the custard over the rhubarb so it settles into the gaps. Visual cue: rhubarb stays visible but is mostly covered.
  4. Bake at 350°F for 50-55 minutes until the custard is set and golden. Visual cue: the center springs back and the top has a browned, caramel tone.
Cool and slice
  1. Cool completely before cutting and serving. Visual cue: the custard firms up into clean slices.

Notes

Pro tip: when you pour the custard, do it slowly so it fills around the rhubarb pieces instead of pooling in one spot. Refrigerate leftovers covered for 3-4 days; the custard will stay set and sliceable when chilled. Freezing: yes, freeze individual slices up to 2 months and thaw overnight in the fridge. For a lighter option, use half-and-half instead of heavy cream, noting the texture may be slightly softer.