Preheat the oven at 180 degrees Celsius.
Place a baking paper in a baking form with removable edges.
Melt the margarine in a casserole, and add the the saffron and the white chocolate and stir until the chocolate is melted.
Add the sugar, almond flour and the eggs and stir together.
Pour the batter in the baking form and place in the middle of the oven for 25 minutes.
Take out the cake and let it cool down before serving it.