Preheat your oven to 350°F (175°C). Grease a 9×13-inch baking dish or line it with parchment paper for easy removal.
In a large mixing bowl, whisk together the pumpkin puree and brown sugar until well combined.
Add the melted butter to the pumpkin mixture and stir until fully incorporated.
In another bowl, combine the flour, baking powder, cinnamon, and salt. Gradually add this dry mixture into the wet ingredients, stirring until just combined.
Fold in the chopped pecans gently to maintain the texture.
Pour the mixture into the prepared baking dish and spread evenly.
Bake in the preheated oven for 30-35 minutes or until the edges are golden and a toothpick inserted in the center comes out clean.
Once done, let it cool slightly before serving. This cobbler is delicious warm or at room temperature!