Preheat your oven to 350°F (175°C) and grease a 9-inch round cake pan with unsalted butter. Line the bottom with parchment paper.

Combine softened unsalted butter and granulated sugar in a large mixing bowl. Beat on medium speed for 3-5 minutes until light and fluffy.

Add room temperature eggs one at a time, mixing on low speed until each is well incorporated.

Stir in the pure vanilla extract until combined.

Whisk together all-purpose flour, baking powder, and salt in a separate bowl. Gradually add to the wet ingredients and mix on low just until combined.

Pour in the whole milk or heavy cream and mix until smooth, without overmixing.

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

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

Cool in the pan for 10-15 minutes before turning out onto a wire rack to cool completely.

Once cool, dust with powdered sugar or add your favorite toppings before serving.