Using a stand mixer with a whisk attachment, beat the butter and granulated sugar on high speed, until creamy. Then, beat in the eggs and vanilla extract.
Reduce the speed of the mixer and slowly add in the milk. Beat until combined.
In a separate large bowl, mix the flour, baking soda, baking powder and salt.
With the mixer running on low speed, gradually add the flour mixture to the egg mixture. Do not over mix during this step.
Add Nature's Flavors Lemon Flavor Syrup and continue mixing on low speed until combined.
Turn off the mixer and fold in the lemon zest with a wooden spoon.
Preheat oven to 350 degrees.
Evenly divide the cake batter into the 3 prepared cake pans. Bake the cakes for 30 to 40 minutes. Once you hit the 30 minute mark, keep an eye out on the cakes to ensure the cakes do not over bake. To test if the cakes are done, insert a toothpick into the middle of the cake and if it comes out clean, the cakes are ready.
Remove from oven and let cool for 10 minutes before removing from cake pans.