Preheat the oven to 350°F (175°C) and coat a standard 12-cup muffin tin with non-stick cooking spray or parchment liners.
In a large mixing bowl, mash the bananas using a fork or whisk until a smooth consistency is achieved.
Incorporate the eggs, almond milk, and vanilla extract into the mashed bananas, whisking until fully integrated.
Add the rolled oats, baking powder, cinnamon, and salt to the wet mixture, stirring with a spatula until combined.
Fold in the chocolate chips.
Distribute the batter evenly across the 12 muffin cups, filling each nearly to the top.
Bake for 22 to 25 minutes, or until the centers are firm to the touch and a toothpick inserted into the center comes out clean.
Allow the oatmeal cups to cool in the tin for 5 to 10 minutes before transferring to a wire rack for complete cooling.