Preheat the oven to 375 degrees F. Grease a 6 cavity jumbo muffin pan.In a large mixing bowl, cream the butter, coconut oil and sugar until fluffy. Add the zest, extract, eggs, and buttermilk and beat just until combined.In a separate bowl, sift the flour, baking powder, baking soda, and salt. Add the flour mixture to the wet mixture and beat just until combined, being careful not to over-beat. A few small lumps is okay.Scoop the batter into the jumbo muffin pan, filling each cavity about 3/4 full.Bake for about 25 minutes or until a toothpick inserted into the middle of a muffin comes out clean but moist. Be careful not to over-bake or the muffins will be dry. Let the muffins cool in the muffin tins for at least 5 minutes before transferring to a wire rack to cool completely.
Notes
* Low quality lemon extract smells strong out of the bottle, but when its baked it loses its flavor. * Optional: Combine some extract lemon zest with some sugar and sprinkle over the filled muffin tins before baking. You can also sprinkle with some flaked coconut.
Optional: I personally prefer the dominant flavor to be lemon, but if you really want even more coconut flavor, you can add a teaspoon of coconut extract as well.