Step 1

First zest and juice the lemons and set aside.

Step 2

Add the sugar and lemon zest to the Thermomix bowl. Mix/mill for 15 seconds / speed 10.

Step 3

Insert the butterfly attachment.

Step 4

Add butter, eggs, egg yolks and lemon juice to the bowl and cook for 20 minutes / 80 degrees / speed 3.

Step 5

Pour into a jar with a lid and cover while it cools. It will continue to thicken as it cools.

Step 6

Store in fridge.