The recipe also calls for custard powder which is a British product that I found at Lunds in the baking aisle. Custard Tea Cake with Raspberries Adapted from Eat Little Bird 1 1/2 sticks unsalted ...
To prepare the custard, mix the custard powder with a little cold milk in a small bowl to form a smooth paste. Heat the remaining milk in a saucepan and add the sugar. Slowly whisk in the custard ...