Preheat ovent to 325°. Prepare 2 9x5 loaf pans with cooking spray, lining bottom of pan with parchment.
In a separate bowl, place flour, poppy seed, baking soda, baking powder, and pinch of salt. Set aside.
Using electric mixer, beat butter and sugar together until fluffy.
Add eggs and vanilla and beat well.
Add buttermilk, zest of 2 lemons, juice of one lemon and combine.
Combine dry ingredients with liquid. Combine until fully incorporated.
Pour batter into prepared pans.
Bake for 45 - 55 minutes until tester comes out clean. Remove from oven and let cool for 15 minutes before removing breads from pans. Let continue to cool on wire rack.