Banana Cake with Peanut Butter Frosting

In a large bowl, cream the butter and sugar together until fluffy. Add eggs and mix well. Beat in bananas and vanilla; mix well. Combine the flour, baking powder, baking soda and cinnamon; add the dry ingredients to the cream mixture, alternating with the milk and beating well. Add chopped walnuts (if you like) to the batter.

Place in a 13×9 greased baking pan. Bake at 350 F for 30 to 35 minutes, until a toothpick or cake tester inserted into the center comes out clean. Cool the cake on a wire rack.

For the frosting, in a small bowl, beat peanut butter, milk and vanilla until well blended. Gradually beat in confectioners sugar until the frosting is smooth. Spread over the cooled cake and add the chopped walnuts, if using.