Preheat oven to 350°F. While oven is preheating, place the coconut oil in a 9x13 size baking dish and place the pan in the oven so the oil can melt as the oven is warming. Whisk flour, granulated sugar, baking powder and salt in a medium sized bowl. Whisk in the plant based milk and vanilla extract.
Once oil is melted, carefully remove hot pan from the oven. Drop spoonful's of the flour mixture evenly all over the melted coconut oil.
Sprinkle the chopped pecans over the top of the batter, then sprinkle the brown sugar evenly over the pecans. Carefully pour the boiling water evenly over the top of the cobbler.
Place the cobbler back in the oven and bake until the cobbler is golden brown all over, about 25-35 minutes.
Cool slightly before serving. Serve hot, warm, or room temperature with whipped cream, ice cream or plain.
