Preheat the oven to 350°F
In a large bowl, combine the vegetable oil, mashed bananas, almond milk yogurt, and vanilla together.
Add in the flour, baking powder, baking soda, cinnamon, nutmeg, and salt.
Separate 1/3 of the batter. Mix in the matcha powder until a green batter forms.
Line a loaf pan with parchment paper. Dollop the banana batter & the matcha batter throughout the pan. Using a knife, swirl around the banana bread.
Bake for 55-60 minutes, or until an inserted toothpick comes out clean. Let the banana bread cool in the pan for 15-20 minutes before removing and slicing.