This recipe provides instructions for making Norwegian Almond Bars, which are a bar cookie made with mashed potatoes. The crust is made from baking powder, salt, sugar, and butter. The filling combines mashed potatoes, powdered sugar, ground almonds, cinnamon, cardamom, water, and an egg white. The partially baked crust is spread with the filling, then the remaining crust mixture is pressed over the top and baked for 20-25 more minutes before cutting into bars while still warm.