black bottom banana bars

Ingredients For black bottom banana bars

• 1/2 c

  butter, softened
• 1 c

  sugar
• 1

  large egg
• 1 tsp

  vanilla extract
• 3-4

  mashed ripe bananas
• 1-1/2 c

  flour
• 1 tsp

  baking powder
• 1 tsp

  baking soda
• 1/2 tsp

  salt
• 1/4 c

  cocoa powder