Preheat oven to 350 degrees F. Line an 8x8 baking dish with parchment paper.
In a large bowl, mix together oats, oat flour, baking soda, cinnamon and salt. Set aside.
In a separate bowl, add the mashed the bananas and whisk in the eggs, almond milk, maple syrup and vanilla, stirring until well-combined.
Add the wet ingredients in to the dry ingredients, mixing until just combined. Fold in the chocolate chips.
Pour mixture into the prepared baking dish and bake in the oven for 35 to 40 minutes, or until a toothpick inserted in the center comes out clean.
Let the pan sit for 5 minutes to cool, then remove the parchment paper with the bars from the pan and allow to cool completely on a wire rack. Slice into 16 square bars (or 9 larger bars).