Rhubarb Custard Cake

A delicate cake featuring fresh rhubarb stalks arranged on top of a rum and lemon-scented custard batter. The tart rhubarb balances perfectly with the sweet, moist cake underneath.

8 servings
1 hr 15 min

Ingredients

  • 4 Tbsp unsalted butter
  • 1 cup all-purpose flour
  • ¾ tsp baking powder
  • ½ tsp kosher salt
  • 2 whole large eggs
  • 1 whole large egg yolk
  • cups sugar
  • ¼ cup sour cream
  • 2 Tbsp dark rum
  • 2 tsp lemon zest
  • 13 oz rhubarb stalks
  • 1 piece springform pan

Cooking Instructions

  1. 1.

    Preheat oven to 350°F. Butter and flour pan. Whisk baking powder, salt, and 1 cup all-purpose flour in a medium bowl. Whisk eggs, egg yolk, and 1 1/2 cups sugar in a large bowl until very pale and thick, about 1 minute. Whisk in melted butter, sour cream, rum, and lemon zest. Add dry ingredients and fold in until batter is smooth; scrape into prepared pan.

    10 min

  2. 2.

    Arrange rhubarb in tight rows over batter, trimming to fit. Don't press fruit into batter-just place over top and let it rest on the surface. Sprinkle with more sugar and bake until cake is golden on top and browned around the sides, 45-55 minutes. Transfer pan to a wire rack and let cake cool in pan 10 minutes. Slide a knife around sides of cake to loosen and unmold. Slide directly onto rack and let cool completely.

    65 min

  3. 3.

    Cake can be baked 1 day ahead. Store tightly wrapped at room temperature.