-
In a mixing bowl, whisk together flour, baking powder, salt, and sugar to remove any lumps.
-
In a small saucepan, heat butter, peanut butter, and milk over low heat, stirring until butter has melted and mixture is smooth. Pour into the flour mixture and stir until just combined. Add eggs and vanilla and stir until incorporated. Fold in banana.
-
Pour about ¼ cup of the batter onto nonstick skillet over medium heat. Cook until bubbles and edges look browned, about 2 - 3 minutes. Flip and cook another 2 - 3 minutes. Repeat with remaining batter.