Mix flour, BP, salt in a bowl
Cream butter, add in olive oil
Beat in sugar
Beat in 1 egg at a time
Add in dry ingredients a little at a time, alternating with buttermilk, and essence plus lime juice
Do not overmixed.
Dump batter onto greased and floured bundt pan, tap a couple of times to remove air bubbles
Bake on preheated 325 F, 60 mins
Let cool in pan before cooling on rack
Let cool completely before glazing (mix icing sugar with lime juice and Cointreau)