In a medium bowl, mix mashed sweet potatoes, 1/2 cup coconut sugar, egg, salt, vanilla, coconut milk, 1/2 cup shredded coconut and 2 Tablespoons butter together.
Pour into a 9 x 9 square baking dish
Combine 1/2 cup coconut sugar, pecans and 1/2 shredded coconut together and sprinkle over top of casserole