Preheat oven to 350F. Spray a 10 inch bundt pan with baking spray and set aside.
In a large bowl combine flour, baking powder and salt, set aside.
In another bowl mix buttermilk, lemon juice and zest and set aside.
In a mixing bowl or the bowl of your stand mixer beat sugar and butter until creamy and pale.
Add eggs one at a time and beat after each addition.
Sprinkle some of the flour mixture and mix well.
Add about half the buttermilk lemon mixture and mix.
Then mix in half the remaining flour mixture followed by the remaining buttermilk mixture.
Now end with the remaining flour mixture and mix well.
Pour the batter into the prepared bundt.
Bake in the center of your oven for about 1 hour or until a toothpick inserted in the middle comes out clean.
Take the cake out of the oven, let it cool in the pan for 10 minutes before inverting it onto a wire rack placed over a large baking sheet.