Preheat your oven to 350°F (175°C) and prepare a 9-inch round cake pan by greasing and lining it with parchment paper.

In a large mixing bowl, cream together 1 cup of softened unsalted butter and 1 cup of granulated sugar until light and fluffy.

Add 4 large eggs one at a time, mixing well after each addition.

Pour in 1 teaspoon of pure vanilla extract and mix until fully combined.

In a separate bowl, whisk together 2 cups of all-purpose flour, 1 tablespoon of baking powder, and 1/2 teaspoon of salt.

Gradually add the dry mixture to the wet ingredients while mixing on low speed until just combined.

Incorporate 1/2 cup of whole milk or heavy cream into the batter until smooth.

Pour the batter into the prepared cake pan and smooth the top.

Bake in the preheated oven for 40-50 minutes until golden brown and a toothpick comes out clean.

Let the cake cool in the pan for 10-15 minutes before transferring to a wire rack to cool completely.