Peel your fresh mango with a vegetable peeler. Cut the flesh of the mango off the pit and then dice the mango into small pieces.
In a medium bowl, mix together the flour, baking powder, baking soda, and salt. Set that aside.
In a large bowl, mix together the mango kefir, egg, vanilla extract, and melted butter.
Pour the dry ingredients into the wet ingredients. Mix until just combined. There will be a few lumps left in the batter, do not overmix.
Fold the mango chunks into the batter. Once again, do not overmix.
Heat a non-stick pan on low heat to medium heat. Place a little butter into the center of the pan. Allow the butter to melt and then add some pancake batter to the pan.
When the pancakes start having bubbles appear on the surface and the edges look dry and just slightly browned, flip the pancakes. Cook the other side for 2 minutes.