This sugar and custard tart has an excellent velvet-like mouthfeel with the sandy sugar topping as a contrast. One of our contestants on Bake Off in Flanders was from the Flemish Limburg region, where vlaai are most popular today. Four years later I found myself by chance in the bakery where she buys her favourite vlaai and I talked to the baker. After I tasted it, it is now a firm favourite in our house too.
The potsuiker in the name translates to ‘bowl of sugar’, whi