Preheat the oven to 375 degrees(F).
Make the base for the cobbler first. In a large mixing bowl, or the bowl of a stand mixer, sift the flour and baking powder.
Stir in the cane sugar, cinnamon, nutmeg, and salt. Whisk to combine.
Using the paddle attachment of the stand mixer, or a hand mixer, slowly add the non-dairy milk to the dry ingredients, beating together the whole time.
Then add the vegan butter and vanilla. Continue beating the batter together until fully combined. About 1-2 minutes. There may be a few lumps of butter, that’s fine.
Pour the batter into a 8x8 or 9x9 inch baking dish that is greased. I use vegan butter for that. Smooth out evenly with rubber spatula.
Spread the sliced bananas out evenly on top of the batter.
Make the topping. In a large mixing bowl, combine the brown sugar, flour, baking powder, oats, cinnamon, salt and pecans.
Add the coconut oil or vegan butter and using a fork or your fingers press and pinch the oil or butter into the dry ingredients until it has a crumbly texture. It should hold together if you pinch it but be in large pieces.
Spread the crumble over the bananas in the baking dish. Spread out evenly with a rubber spatula.
Bake for 45-50 minutes or until a toothpick comes out clean. Serve with vegan ice cream if desired. I like to serve the cobbler warm!