Preheat the oven to 180°C.
Sieve 100g flour with baking powder.
Melt 30g white chocolate with 20mL of milk in a hot water bath. Stir occasionally until combines.
In a separate bowl, put the softened butter in. Add 30g of white sugar, mix well. Beat an egg in it. and mix well.
Add 2 tablespoons of the flour mix to the butter mix. Mix until just combined. Then add ⅓ of the chocolate mix, mix well. Keep repeating until all the 3 mixtures combined.
Fold in the cranberries and chopped white chocolate.
Split them into a muffin tin equally into six portions.