Incorporate the cornstarch and flour with ¼ cup (60ml)milk . Pour the rest of 1 ¼ cup (300ml) milk into a saucepan and bring to a simmer. Pour about a third of the hot milk over the egg yolks mixture. Pour the whole mixture into the saucepan over the milk. Bring to a boil while stirring and thickens. Keep enough over heat to cook all the cornstarch. Add vanilla extract.

Pour the cream into a clean bowl and allow to cool for 10 minutes then incorporate the butter while stirring. Cover with plastic wrap, pressing it directly onto the surface of the pastry cream to prevent forming a skin on the surface. Let it cool at room temperature and then refrigerate until ready to use.

In a medium bowl whisk flour, baking powder and salt. Set aside until ready to use.

In a large mixing bowl add butter and sugar and mix to combine. Incorporate eggs one at a time and add vanilla extract.

Gradually add flour mixture while alternating with milk.

Pour the batter evenly into the prepared pan.

Bake for about 35-40 minutes until a toothpick inserted into the center comes out clean.

Let pan cool on a cooling rack for 10 minutes.

Remove the cake from the pan and let it cool completely.

Place the other layer of cake on top.

Using an offset spatula spread the ganache over the top and edges of the cake.

Let it set for 15 minutes then serve.

Store any leftovers in the refrigerator.