Grease the cake pans with small butter straight from the fridge.
Divide the 2 tablespoons of butter between the pans.
Distribute the brown sugar evenly among the two pans.
In a medium sized mixing bowl combine, the flour, baking powder, baking soda, and salt. Stir to combine.
In a second bowl combine the pure cane sugar, buttermilk, and vanilla extract.
Add the wet ingredients on top of the dry ingredients. Stir util just combined. Don't over work it.
Pour the batter evenly over each cake pan
Bake in your air fryer at 300 degrees for 15-17 minutes or until the cakes reach an interbak temperature over 200 degrees when tested with a thermometer.
Allow to cool for 5 minutes
Run a knife along the sides of the cake, then grab a small plate, turn it upside down and put it on top of the cake pan. Turn it upside down so the plate is on the bottom. Tap the cake pan until it slides out.
Allow to cool before enjoying. The top will solidify like a jam and won't be runny.