I like to use cases to bake these muffins in because they are very moist! They will be easier to remove from the pan and easier to store if baked in cases
You can use the same amount (in ml) of vegetable oil instead of melted butter. I like to use melted butter because of the flavour it gives these banana blueberry oatmeal muffins.
Both fresh and frozen blueberries work in this recipe. If using frozen fruit, no need to thaw them before baking. Remember not to over work the batter after adding the blueberries or the fruit will bleed into the mixture.
This recipe is perfect for using up overripe bananas. Next time you have overripe bananas, if you cannot bake immediately, freeze the fruit until you have chance, then thaw before mashing to make these beauties!
When making muffins, it is really important to remember not to over mix the batter. Over mixing muffin batter will lead to tough and chewy muffins, not light and fluffy ones. When adding in the flour and oats at the end, mix it all together until just combined and no more large amounts of dry flour is visible, no more than this.
I like topping my oat banana and blueberry muffins with a little extra (granulated) sugar before baking to give a little bit of crunch on top. This is totally optional, but makes for a love texture!
The oatmeal banana blueberry muffins should not be left to cool completely in the tin. Once baked and removed from the oven, allow them to cool for a couple of minutes in the tin before removing and leaving on a wire rack to cool.