Preheat oven to 350°F (180C).
Grease a 10.2 inch heart shaped pan and set aside.
In a large bowl using a hand mixer, cream together granulated sugar and unsalted butter on medium speed for 3 minutes until light in color. Scape down the bowl when necessary.
1 & ¼ cups Granulated Sugar, 3/4 cup Unsalted Butter
Add the eggs one at a time, incorporating well after each addition. The mixture will look curdled. It's normal.
3 Eggs
Mix in the milk, pure vanilla extract, lemon juice and zest.
1/2 cup Milk, 1/2 tsp Pure Vanilla Extract, 1/4 cup Lemon Juice, Lemon Zest
With the mixer running on low, gradually incorporate the all-purpose flour and baking powder. Add the salt and mix until just combined.
2 cups All-Purpose FLour, 2 tsp Baking Powder, 1/4 tsp Salt
Pour the batter into the greased pan and hit the pan once on the counter to release any air bubbles.
Bake for 45 minutes until the cake is golden brown around the edges and an inserted toothpick comes out clean with little to no crumbs.
Remove from oven and let it cool complete inside the pan.