In this task, you will be presented with the directions of a recipe separated by "," and have to fill in the "___" which is a step that is missing from the recipe.

In a mixing bowl, cream shortening and sugar.,Beat in egg and egg white.,Add buttermilk and bananas, mix well.,______,Add vanilla and nuts.,Pour into two greased and floured 9 inch round baking pans.,Bake at 350F (180C).,for 35 minutes or until cake tests done.,Cool in pans 10 minutes before removing to a wire rack.,For filling, melt butter and brown sugar in a saucepan over medium heat.,In a small bowl, combine flour and salt with a small amount of milk; stir until smooth.,Add the remaining milk gradually.,Add egg yolk and mix well; stir into saucepan.,Cook and stir over medium heat until very thick, about 10 minutes.,Add vanilla and nuts.,Cool.,Spread between cake layers.,Dust with confectioner's sugar.,Chill.,Store in the refrigerator.
Combine flour, baking soda and salt; stir into the creamed mixture.