Rhubarb Custard Cake

1. 1

   Preheat oven to 350u00b0F. 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.

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.

3. 3

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

No additional tips available.