Peel and chop your banana into 1 inch/2cm chunks. u003cbr/u003e2. Freeze for a minimum of 3 hours (preferably 12+ hours) in a freezer bag or container. u003cbr/u003eu003cbr/u003eFor best results and to prevent your bananas from browning do a ‘flash freeze’. This is where you freeze your banana chunks spaced out on a baking sheet covered in parchment for 2 hours, then transfer the pieces to a bag.