There will be 1/2 of the white chocolate left once the first 30 cookies are dipped
It is best not to melt all at once, as it will thicken and need remelting after second batch is made
Add remaining 100g of chocolate to thickened leftover dipping chocolate, ensuring there are no cookie crumbs in the leftover chocolate
Proceed dipping as with first batch
Chocolate takes a long time to set; place in the fridge for 15-20 minutes to expedite the process