Preheat your oven to 170°C/340°F (150°C fan) and line a large baking tray with baking paper.
Place the bananas on the baking tray, spaced apart. Bake for 15-25 minutes, until the skins have turned completely black and shiny and the bananas are soft to touch. Timing will depend on the size of the bananas.
Remove from the oven and leave to cool - they will be very hot.
Snip off the end of each banana with scissors, squeeze the flesh directly into your mixing bowl and mash with a fork. Allow to cool completely before using in your recipe.
If you have any leftover mashed bananas, they can be stored in the fridge for a couple of days in an airtight container.
Notes
Bananas: This method works best with bananas that are ripe but still firm - yellow with few or no spots. Green bananas won't be sweet or soft enough for baking, even after roasting.Tips: Your baking paper may stain from sticky syrup the bananas release during cooking - this is completely normal. This method works for as many or as few bananas as you need - just adjust the quantity to suit your recipe.