Preheat oven to 350F and line 4, 9.75"x 3.75" Rectangular cake pans OR 1, 9"x 2" round pan in parchment paper, grease the sides and set a side.
In a medium bowl, sift the flour, baking powder and salt and whisk to combine.
In a bowl of a standing mixer, fitted with the paddle attachment beat the butter, sugar, honey and vanilla extract on medium for 5-7 minutes. You should have a light and fluffy mixture. Stop the mixer once or twice and scrap the sides and bottom of the bowl.
Reduce speed to low and add the eggs and egg yolk one at a time waiting for each egg to fully incorporate before adding the next.
With the mixer still on low, add the flour in 3 additions alternating with the butter milk.
Once you added the third and final flour addition, stop the mixer and using a rubber spatula, and incorporate the remaining of the flour until will combined.
Dived the batter between the pans and spread it evenly. Bake in the middle rack for 15-18 minutes or until a tooth pick comes out dry (dry, moist crumbs are ok) from the center of the cake.
Remove cakes from the oven and allow to completely cool before removing.