Preheat the oven to 425 F. Line a muffin tin with muffin liners.

In a medium bowl, add the bananas. Mash well, until no chunks remain.

Add the maple syrup, egg, olive oil, and vanilla extract to the bowl. Mix to combine.

In a separate large bowl, add the whole wheat flour, all-purpose flour, baking powder, baking soda, and salt. Mix to combine.

Pour the wet ingredients into the dry and mix until just combined, making sure not to over mix. Fold in 3/4 cup of the chocolate chips.

Using a small ice cream scoop or spoon, scoop the batter into the lined muffin tin. You should have 12 muffins. Using the back of a spoon, gently level out the muffins. Add the remaining chocolate chips to the tops of the muffins.

Bake in the preheated oven for 5 minutes. Then, leaving the muffins in the oven, lower the temperature to 350 F and bake for an additional 14-15 minutes, until a knife inserted in the center comes out clean.

Let cool and enjoy.