Preheat oven to 350 degrees.
Peel the skin off peaches. Cut them in half and remove the seed and any seed remnants. Slice the peaches into equal size slices.
Inside of a large skillet, add the sliced peaches, ⅔ cup vegan sugar and ¼ teaspoon salt over medium heat. Stir and cook for about 5 minutes. The peaches will get really juicy as the sugar dissolves into them. Remove and set aside.
In a large bowl, add the flour, brown sugar, baking powder, and salt. Whisk together.
Pour in the maple syrup, vanilla extract, and dairy free milk. Stir together with a spatula. Do not over mix.
Pour the melted butter in the bottom of a 9x13 casserole dish and spread out to make an even layer.
Pour the batter into the casserole dish over the butter.
Spread out into an even layer as much as possible. Some of the butter will come up over it and that is fine, but do not stir them together.
Pour the peaches and juice over top of the mixture in the casserole dish.
Sprinkle with ground cinnamon on top. *You can do as little as ¼ teaspoon or as much as a whole teaspoon. We like doing the whole teaspoon. Place in pre-heated oven for 35-45 minutes.
Check for doneness of the sweet dough mixture. A toothpick inserted into just the crust should come out clean.
Remove from oven and let sit for 15-20 minutes.