Pre-heat oven to 350°F (180°C). Grease and flour an 8 inch square or round cake pan.
In a medium bowl whisk together flour, baking powder, baking soda and salt.
In a medium bowl beat together butter, sugar and vanilla, until light and fluffy (approximately 3 minutes), add the egg and beat, add the mashed bananas and beat to combine.
To the Creamed mixture alternately add the dry ingredients with the sour milk, beat on high until smooth.
Pour into prepared cake pan and bake for approximately 30-35 minutes or until cake tester comes out clean. Let cool completely before frosting. Enjoy!
** mix together 2 tablespoons milk and 1/4 teaspoon lemon juice, let sit 10-15 minutes.
CREAM CHEESE FROSTING
In a medium bowl beat butter and cream cheese until creamy approximately one minute. Add icing sugar a little at a time, continue beating, add salt and cream beat approximately 3 minutes until fluffy.