Preheat the oven to 350°F (180°C). Line 18 cupcake wells with cupcake liners
In a medium bowl, mix together the flour, baking powder, baking soda, and salt. Set aside
In the base of a stand mixer or in a bowl with a hand mixer, cream together the butter, coconut oil, and sugar until pale, light and fluffy. This will take about 5 minutes on medium high speed. Scrape down the bowl halfway through
With the mixer still running, slower pour in the egg white and whip for 1-2 minutes until well combined
Add in the extracts and mix until well combined
Reduce the mixer speed to low and then add 1/3 of the flour mixture until just combined then add ½ of the buttermilk and repeat the remaining flour and buttermilk, alternating. You should start and end with the dry
Divide the batter evenly into 18 cupcake wells
Bake for 20-25 minutes or until a toothpick comes out clean