Video: Waste no time pre-heating the oven, friends. The microwave can make the perfect batch of peanut butter-infused chocolate chip biscuits in 2.5 minutes flat.
There's some assembly time, of course, during which you'll mix butter, brown sugar, egg, flour, baking powder, salt and the peanut butter and chocolate chips together. After microwaving, you can use a tumbler to make perfectly-sized cookies as in Mumsnet's video (and eat the excess) or eat the enormous flattened cookie without cutting. We won't judge.
Microwave cookies [YouTube]