In a large bowl mix flour, sugar, baking powder, milk, eggs, butter and vanilla. I use a hand beater for a quick minute or two.
Grease and line a round cake tin with baking paper. Pour the mixture into tin. The original recipe called for a 22cm tin, but I only have a 25cm one which works out fine.
Cook for approx an hour. Check at this point with a skewer and cook for further five minute increments if the skewer doesn't come out clean.
Allow the cake to cool in the tin for a few minutes, before moving to a wire rack.
In the photo above, to have the cake sit nicely on the plate, I sliced the top of the cake off and turned it upside down. Then the 3 year old helped me dust it (quite heavily!) with icing sugar.
Recipe by Planning With Kids at https://planningwithkids.com/2009/11/22/simple-butter-cake-recipe/