Preheat the oven to 200 degrees and grease and line 2 x muffins trays with paper cases (mixture makes approximately 18).
Place the butter and 200 grams of marmalade into your Thermomix bowl and cook for 3 minutes, 60 degrees, speed 2.
Add the poppy seeds, self raising flour caster sugar, milk, eggs and orange rind and mix for 10 seconds, speed 5.
Scrape down the sides of the bowl and mix for a further 10 seconds, speed 4, or until just combined.
Spoon mixture into paper cases, until approximately ¾ full. Bake in oven for 15 - 18 minutes, or until golden on top and cooked through when tested.
While muffins are cooking, heat remaining marmalade in the microwave. When muffins are out of the oven, brush the tops generously with the warm marmalade and allow to cool in tray for 10 minutes before transferring to a wire rack to cool completely.