Boston Cream Pie

To make the custard, in a medium sauce pan, whisk together the eggs, sugar, corn starch and salt until well combined and no lumps remain. Then whisk in the milk until well combined. Heat the mixture over medium-high heat for 2 to 4 minutes, or until thickened. Remove from heat and whisk in the vanilla. Add the pieces of butter, and stir until completely melted and smooth. Pour the custard into a bowl, cover with plastic wrap, and refrigerate until completely chilled.

To assemble the cake, level the cake rounds using a serrated knife or cake leveler. Place one of the cake rounds on a serving plate, and gently spread the cooled custard evenly over the cake layer. Add the remaining cake layer on top.