Preheat your oven to 350°F (175°C) and grease a heart-shaped cake pan with nonstick spray.

In a large bowl, whisk together flour, baking powder, and salt.

In another bowl, cream softened butter and sugar until light and fluffy. Add eggs one at a time, then mix in vanilla.

Gradually combine the dry ingredients with the wet mixture, alternating with milk until just combined.

Pour the batter into the prepared pan and bake for 25-30 minutes or until a toothpick inserted comes out clean.

Allow the cake to cool completely before frosting.