Preheat oven to 175c and grease and flour your pan

In a small saucepan over low heat, melt the butter. Stir in milk and vanilla and continue to heat until small bubbles form around the outside of the pan and the mixture is very hot but not boiling. Reduce heat to low.

Combine the eggs and sugar and whisk on medium-high speed with your mixer for 5 minutes.

In a medium bowl, sift together flour, baking powder, and salt.

Once the egg and sugar mixture has tripled in volume, slowly add the hot milk mixture, mixing on low speed until incorporated. Add the dry ingredients in two batches, mixing after each addition until just incorporated.

Pour the batter into the prepared pan and bake for 1 hour, checking 5 minutes prior to baking end time. A toothpick inserted into the middle of the cake should come out clean.

Cool in the pan for a few minutes then invert onto the cooling rack