DH and I are staying at my best friends house looking after her DSs wlist she is whisked off to Marakesh for the weekend. Its her 40th and I thought we might all make a lemon drizzle for her return this evening - now, I've hunted high and low but can't find a processor/mixer. Do I have to cream the butter and sugar by hand or can I use melted butter to make it all super easy?