Preheat oven to 350°F. Prepare a 12 cup muffin tin with liners.
In a small saucepan over medium heat, combine the adzuki beans and 2 tbsp maple syrup. Bring to a simmer and cook for 8-10 minutes, until beans are softened and there is no liquid left. Remove from heat.
In a large bowl, combine the melted coconut oil and 1/2 cup of maple syrup. If your coconut oil begins to harden, heat the mixture in a double boiler or place your bowl over a pot with simmering water (make sure your bowl is heatproof!).
In a separate small bowl, combine your flax seeds and 3 tbsp water. Allow to stand for a few minutes until thickened and gelatinous. This is your flax egg!
Add the flax egg to the wet ingredients. Add remaining ingredients and mix with a spatula until just combined.
Evenly distribute the batter into the prepared muffin tin. Bake until a toothpick inserted into the middle comes out clean, about 35 minutes. Remove from muffin tins.