- 1 1/2 cups all-purpose flour
 - 1 1/4 cups white sugar, divided
 - 2 1/2 teaspoons baking powder
 - 1 teaspoon salt
 - 6 eggs, separated, divided
 - 3/4 cup water
 - 1/2 cup vegetable oil
 - 1 teaspoon vanilla extract
 - 1/2 teaspoon cream of tartar
 - 2 bananas, mashed
 
- Preheat oven to 350 degrees F (175 degrees C).
 - Sift flour, 1/2 of the sugar, baking powder, and salt together in a bowl. Add egg yolks, water, oil, and vanilla extract and beat until smooth.
 - Beat egg whites and cream of tartar together in a bowl using an electric mixer until soft peaks form. Continue beating until stiff and shiny peaks form; add remaining sugar and beat until incorporated. Fold egg yolk mixture and bananas into egg white mixture just until blended. Slowly pour batter into a 10-inch tube pan.
 - Bake in the preheated oven until cake springs back when lightly touched, 55 to 65 minutes. Invert pan onto a plate and cool. Loosen edges of cake and remove pan.