Directions

1. Break the eggs into a large heatproof mixing bowl, add the egg yolks, flour, sugar and vanilla and whisk by hand until well blended
2. Pour milk into a pan and place over a gentle heat until hand-hot to touch

3. Slowly pour the hot milk over the egg mixture, whisking continuously until combined

4. Pour back into the pan and return to a gentle to a gentle heat. Stir continuously with a wooden spatula until just thickened and coating the back of the spoon

5. Remove from the heat at once and set aside to cool.