Here's my top tips to keep your muesli bars nicely intact when you slice them up! - Start with a great muesli bar recipe - the foundation of this recipe has peanut butter and honey which binds the muesli bar ingredients together perfectly. - Chop the fruit and nuts quite small for easy cutting. - Press the mixture really firmly into the baking tin before cooking, and then allow the muesli bar to chill completely in the fridge before cutting (a minimum of 4 hours - but overnight is best). - Use a very sharp knife when cutting.  - Score the chocolate in lines until you break through the chocolate layer and then press down firmly with the knife.