Nutella Stuffed Banana Muffins

line a muffin tin with muffin liners and set aside. set the oven to 350f. in a mixing bowl, add the wet ingredients and mix with a spatula until smooth. add the dry ingredients the bowl and stir through, folding until well-combined (but not overmixed). use a cookie scoop to drop batter into each of the muffin liners, careful to fill only halfway. then add a scoop of nutella to each muffin liner and top again with more batter to cover. finally, top each muffin with another scoop of nutella and swirl a bit. bake for 20-23 minutes or until the muffins are golden brown. let cool a bit and enjoy!