Step 1

Preheat oven to 180C/350F

Step 2

Mash bananas and add the lightly beaten egg, sugar and butter and mix well to combine and set aside.

Step 3

In another bowl add the flour, baking soda, baking powder and salt and whisk well. Add nuts or chocolate or whatever add-ins you want to the dry ingredients.

Step 4

Add dry ingredients to wet ingredients and mix until nearly all the flour has disappeared. Overmixed muffins are tough.

Step 5

Pour into greased cupcake pans (add streusel if you wish) and bake for about 20 minutes. Touch the tops and if they spring back, they're done.

Step 6

Place all ingredients into a food processor and pulse until it's streuselly. (or crumbly) If you don't have a processor, a fork works just fine - or your fingers.