In a large mixing bowl, whisk flour, sugar, baking powder, baking soda, and salt.
Add bananas, buttermilk, butter, and vanilla and beat until well combined.
Beat in eggs on medium speed until well blended.
Pour into cupcake tins or cupcake liners and fill ¼ full.
Spoon 1 tbsp of cream cheese filling on top of batter.
Pour remaining batter on top of cream cheese filling, to ¾ full.
Bake at 350° for approximately 17-24 minutes (depending on the size cupcakes you are baking), until a toothpick inserted in the middle comes out clean.