This is a Dutch butter cake.
I grew up in a traditional Dutch family and is one of the most well known traditional Dutch Recipe. It is Boterkoek, not Botercake. Also, I think it is a typo that you bake in in a LOAF pan. You don't - I've never in my life seen it baked in a loaf pan. You bake it in one 10 inch round cake pan. Always. - 20 Mar 2007 (Review from Allrecipes US | Canada)
Actually something strange happened to this recipe. In the original recipe I submitted a very long time ago, there were equal quantities of butter, sugar and flour. The measurement of each of these three should be 50 grams per egg. So a 5 egg recipe requires 250 grams butter, 250 grams sugar and 250 grams flour. I'm sure if you try this the result will turn out better! In August I have submitted the recipe for the BOTERKOEK that some of the reviewers here are talking about. BoterKOEK is completely different from BoterCAKE. Unfortunately this recipe is not public yet. - 25 Aug 2007 (Review from Allrecipes US | Canada)
Very good!!! Baked this in a 10-in cake pan so it baked in about 30 minutes. - 11 Jul 2006 (Review from Allrecipes US | Canada)