My preferred method also.
But the home made version is (in brief):
I think your: "1. Pour Water" recipe is better.
- Separate 4 eggs, putting the yolks into a large bowl.
- Add 30g caster sugar and whisk until combined.
- Add the 30g plain flour and ½ tsp vanilla extract and whisk until combined.
- Gently heat 300ml full fat milk until warmed but not boiling. Stir regularly to ensure that it does not burn.
- Once the milk is warm, remove from the heat and gradually add to the large bowl a bit at a time. Whisking each addition in completely before adding more.
- Once combined, put the mixture into the pan and return to a very gentle heat.
- Continue to cook, whisking constantly, until the custard has reached your desired thickness – this usually takes about 10 minutes but will depend on how runny you want your custard to be. You must whisk the custard constantly to avoid it going lumpy.
- Remove from the heat and continue to whisk for another minute.