Preheat the oven to 325 degrees F. Grease and flour a tube pan or bundt pan. Ours was a 10 inch pan. If using a smaller size, be careful not to fill more than ¾ full to prevent overfilling.
In a medium bowl, whisk the cake flour, baking powder, baking soda, and salt for 30 seconds and set aside.
In another bowl, combine the buttermilk, vegetable oil, lemon juice, and lemon zest. Set aside.
In the bowl of your mixer, add the butter, cream cheese, and lemon extract and mix at medium speed until smooth.
Gradually add the sugar and mix at medium speed for 2-3 minutes.
Add the room temperature eggs one at a time, mixing after each addition until the yellow of the yolk disappears.
With the mixer on low speed, alternately add the flour mixture and the buttermilk mixture, beginning and ending with the flour mixture (We did 3 additions of the dry mixture, 2 additions of wet). Slightly increase the mixer speed just until combined.
Scoop the batter into the prepared tube or bundt pan. We used a 10 inch tube pan. (In case your pan is smaller, as a general rule, don't fill your pan more than ¾ full.)
Bake at 325 degrees F for 50-55 minutes or until a toothpick inserted into the center comes out clean or with just a few crumbs attached. Allow to cool for 10 minutes before turning out.
This recipe makes approximately 8 cups of batter.