In a medium mixing bowl, whisk together the flour, baking powder, baking soda and salt.
In a small mixing bowl, add the buttermilk, mashed banana, brown sugar, egg, vanilla extract, and melted butter. Lightly beat until combined.
Add the wet ingredients to the dry ingredients and mix until just combined, being sure to not overmix. Lumps make for fluffy pancakes! You may need to add a tablespoon or two of additional buttermilk to get the right consistency.
Allow the batter to rest for 10 minutes, meanwhile, place a large pan over medium heat and add ½ tbsp. of butter. Scoop the batter out using ⅓ measuring cup and pour into the center of the heated pan. Allow the pancakes to cook approximately 2 minutes or until you see small bubbles on the surface of the pancake. Flip, and cook for 1-2 additional minutes. The pancakes should be lightly golden brown in color.
Drizzle melted peanut butter between layers of pancakes. Sprinkle with mini chocolate chips and top with banana slices, if desired.
Notes
Warm your peanut butter by adding it to a microwave-safe mixing bowl and heating on half powder for 30 seconds to 1 minute.