Preheat the oven to 355°F (180°C). Prepare a muffin tin with liners or lightly grease them.
Peel the bananas and set 0.5 of a banana (will be used later for decorating). Mash the rest of the bananas.
Add the mashed bananas to a mixing bowl and mix with the wet ingredients- date syrup, oil, soy milk and vinegar, set aside.
In a large mixing bowl, mix the dry ingredients together- the flour, almond flour, baking soda, the cinnamon and salt.
Add the wet mixture into the dry mixture and beat together just to combine.
If you wish, add some chocolate chips to all or part of the mixture.
Slice the banana you kept aside to 12 slices.
Divide evenly among the muffin tins and top with the banana slices.
Place in the oven and bake for 15- 20 minutes. The muffins are ready when a toothpick comes out dry.
Remove from the oven and place on a cooling rack.
Once cooled completely, store in an airtight container, or save in the freezer.